Common Weakness Enumeration

CWE-347

Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

CVE-2026-46349 (GCVE-0-2026-46349)

Vulnerability from cvelistv5 – Published: 2026-06-24 19:40 – Updated: 2026-06-25 13:16
VLAI
Title
Mastodon: LD-Signature Bypass via JSON-LD Named-Graph Restructuring
Summary
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, Mastodon's normalization of incoming activities signed with Linked-Data Signatures does not sufficiently protect the activities from a certain class of spoofing, allowing attackers to re-arrange a valid signed JSON-LD activity from a third-party actor to have it processed differently. This vulnerability is fixed in 4.5.10, 4.4.17, and 4.3.23.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
mastodon mastodon Affected: >= 4.5.0-beta.1, < 4.5.10
Create a notification for this product.
Show details on NVD website

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CVE-2026-46423 (GCVE-0-2026-46423)

Vulnerability from cvelistv5 – Published: 2026-06-24 20:58 – Updated: 2026-06-26 03:55
VLAI
Title
Rocket.Chat: SAML signature validation skipped when IdP certificate field is empty
Summary
Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's SAML service provider implementation silently skips both SAML Response and Assertion signature validation when the configured IdP certificate field is empty. The verifySignatures routine performs an early return when serviceProviderOptions.cert is falsy, which is the default state of the setting. Because provider registration only gates on the SAML "enabled" toggle and not on the presence of a certificate, an administrator who enables SAML without pasting an IdP certificate obtains a fully wired, publicly reachable SAML login endpoint that accepts unsigned or attacker-supplied assertions. This is a default-configuration authentication-bypass class: the fail-open branch is reached with no misconfiguration beyond leaving a field at its shipped default. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
RocketChat Rocket.Chat Affected: >= 8.5.0-rc.0, < 8.5.0
Affected: >= 8.4.0-rc.0, < 8.4.1
Affected: >= 8.3.0-rc.0, < 8.3.3
Affected: >= 8.2.0-rc.0, < 8.2.3
Affected: >= 8.1.0-rc.0, < 8.1.4
Affected: >= 8.0.0-rc.0, < 8.0.5
Affected: >= 7.11.0-rc.0, < 7.13.7
Affected: < 7.10.11
Create a notification for this product.
Show details on NVD website

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CVE-2026-48523 (GCVE-0-2026-48523)

Vulnerability from cvelistv5 – Published: 2026-05-28 15:10 – Updated: 2026-05-28 15:27
VLAI
Title
PyJWT: Algorithm allow-list bypass when decoding with `PyJWK` / `PyJWKClient` keys
Summary
PyJWT is a JSON Web Token implementation in Python. From 2.9.0 to 2.12.1, there is a verifier-side algorithm allow-list bypass when jwt.decode() or jwt.decode_complete() are called with a PyJWK key. The token header alg is checked against the caller-supplied algorithms allow-list, but signature verification is performed with the algorithm bound to the PyJWK object instead of the header algorithm. An attacker who controls a registered JWK/JWKS private key can sign with a disallowed algorithm, advertise an allowed algorithm in the JWT header, and still be accepted. The issue affects the documented PyJWKClient.get_signing_key_from_jwt(...) flow. This vulnerability is fixed in 2.13.0.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
jpadilla pyjwt Affected: >= 2.9.0, < 2.13.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-48526 (GCVE-0-2026-48526)

Vulnerability from cvelistv5 – Published: 2026-05-28 15:09 – Updated: 2026-07-06 12:04
VLAI
Title
PyJWT: Public-key JWK accepted as HMAC secret enables forged HS256 tokens when mixed families are allowed
Summary
PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the secret key for HMAC algorithm. This vulnerability is fixed in 2.13.0.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
URL Tags
https://github.com/jpadilla/pyjwt/security/adviso… x_refsource_CONFIRM
https://access.redhat.com/security/cve/CVE-2026-48526 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482734 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:34160 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:34365 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:35845 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25902 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:35837 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:35836 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:35835 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26206 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30089 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30088 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:34374 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25928 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33683 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30076 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28571 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
jpadilla pyjwt Affected: < 2.13.0
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Red Hat Red Hat Ansible Automation Platform 2.6 for RHEL 9     cpe:/a:redhat:ansible_automation_platform:2.6::el9
    cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9
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Red Hat Red Hat Satellite 6.19 for RHEL 9     cpe:/a:redhat:satellite:6.19::el9
    cpe:/a:redhat:satellite_capsule:6.19::el9
    cpe:/a:redhat:satellite_maintenance:6.19::el9
    cpe:/a:redhat:satellite_utils:6.19::el9
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Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.4)     cpe:/a:redhat:rhel_e4s:9.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
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Red Hat Red Hat Enterprise Linux High Availability E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::highavailability
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Red Hat Red Hat Enterprise Linux High Availability E4S (v.9.4)     cpe:/a:redhat:rhel_e4s:9.4::highavailability
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Red Hat Red Hat AI Inference Server 3.3     cpe:/a:redhat:ai_inference_server:3.3::el9
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Red Hat Red Hat Ansible Automation Platform 2.6     cpe:/a:redhat:ansible_automation_platform:2.6::el9
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Red Hat Red Hat Ansible Automation Platform 2.7     cpe:/a:redhat:ansible_automation_platform:2.7::el9
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Red Hat Red Hat Quay 3.10     cpe:/a:redhat:quay:3.10::el8
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Red Hat Red Hat Quay 3.12     cpe:/a:redhat:quay:3.12::el8
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Red Hat Red Hat Quay 3.9     cpe:/a:redhat:quay:3.9::el8
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Red Hat Red Hat Enterprise Linux Resilient Storage E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::resilientstorage
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Red Hat Red Hat Enterprise Linux Resilient Storage E4S (v.9.4)     cpe:/a:redhat:rhel_e4s:9.4::resilientstorage
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Red Hat Migration Toolkit for Applications 8     cpe:/a:redhat:migration_toolkit_applications:8
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Red Hat OpenShift Lightspeed     cpe:/a:redhat:openshift_lightspeed
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Red Hat Red Hat AI Inference Server     cpe:/a:redhat:ai_inference_server:3
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Red Hat Red Hat Ansible Automation Platform 2     cpe:/a:redhat:ansible_automation_platform:2
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Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3     cpe:/a:redhat:enterprise_linux_ai:3
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Red Hat Red Hat Hardened Images     cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
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Red Hat Red Hat Quay 3     cpe:/a:redhat:quay:3
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Red Hat Red Hat Satellite 6     cpe:/a:redhat:satellite:6
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Red Hat Red Hat Trusted Artifact Signer     cpe:/a:redhat:trusted_artifact_signer:1
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Red Hat Red Hat Update Infrastructure 4 for Cloud Providers     cpe:/a:redhat:rhui:4::el8
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Show details on NVD website

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CVE-2026-48558 (GCVE-0-2026-48558)

Vulnerability from cvelistv5 – Published: 2026-06-12 17:07 – Updated: 2026-06-30 03:55
VLAI
Title
SimpleHelp Authentication Bypass via Missing OIDC JWT Signature Verification
Summary
SimpleHelp versions 5.5.15 and prior and 6.0 pre-release versions contain an authentication bypass vulnerability in the OIDC authentication flow. When OIDC authentication is configured, identity tokens submitted during login are accepted without verifying their cryptographic signature. In a vulnerable configuration, a remote, unauthenticated attacker can submit a forged token containing arbitrary identity claims to obtain a fully authenticated technician session. In some configurations, this may also allow bypass of multi-factor authentication. No user interaction is required.
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
Impacted products
Vendor Product Version
SimpleHelp SimpleHelp Affected: 5.5.0 , < 5.5.16 (semver)
Affected: 6.0 , < 6.0 RC2 (custom)
Create a notification for this product.
Date Public
2026-05-26 00:00
Credits
Zach Hanley (@hacks_zach) of Horizon3.ai
Show details on NVD website

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CVE-2026-49454 (GCVE-0-2026-49454)

Vulnerability from cvelistv5 – Published: 2026-06-18 20:52 – Updated: 2026-06-22 15:51
VLAI
Title
Relyra SAML SignatureValue not cryptographically verified -> authentication bypass
Summary
Relyra is a strict-by-default SAML 2.0 Service Provider library for Elixir and Phoenix. Versions 1.0.0 and 1.1.0 accept forged SAML signatures because SignatureValue was not cryptographically verified before the library returned a successful authentication result. The XMLDSig trust boundary was incomplete as :public_key.verify over the exclusive-C14N canonicalized SignedInfo was not performed against the configured IdP certificate's public key, DigestValue was not recomputed over the canonicalized referenced element, and canonicalize/2 remained an unused passthrough in the signature-verification path. The result was a structure-only acceptance path where document shape and trust-source rejection could succeed without proving the signature bytes. A forged SignatureValue carrying an attacker-controlled NameID could be accepted as {:ok}. This issue has been fixed in version 1.2.0.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
Impacted products
Vendor Product Version
szTheory relyra Affected: >= 1.0.0, < 1.2.0
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Show details on NVD website

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CVE-2026-50010 (GCVE-0-2026-50010)

Vulnerability from cvelistv5 – Published: 2026-06-12 14:50 – Updated: 2026-07-06 12:05
VLAI
Title
Netty's wrapping plain trust manager silently disables hostname verification
Summary
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, SimpleTrustManagerFactory.engineGetTrustManagers() and related paths wrap any user-supplied plain X509TrustManager in X509TrustManagerWrapper, which extends X509ExtendedTrustManager but implements the 3-arg checkServerTrusted(chain, authType, SSLEngine) by discarding the SSLEngine and calling the 2-arg delegate. Because the object now IS an X509ExtendedTrustManager, neither SunJSSE's internal AbstractTrustManagerWrapper nor Netty's own OpenSslX509TrustManagerWrapper will re-wrap it to add endpoint-identification. Consequently, even though Netty 4.2 sets endpointIdentificationAlgorithm="HTTPS" by default, a client built with `SslContextBuilder.forClient().trustManager(somePlainX509TrustManager)` performs no hostname verification at all. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
Impacted products
Vendor Product Version
netty netty Affected: >= 4.2.0.Final, < 4.2.15.Final
Affected: < 4.1.135.Final
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Red Hat Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1     cpe:/a:redhat:apache_camel_quarkus:3.33
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Red Hat Red Hat Offline Knowledge Portal 1.2.7     cpe:/a:redhat:offline_knowledge_portal:1.2::el9
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Red Hat Red Hat build of Quarkus 3.27.4.SP1     cpe:/a:redhat:quarkus:3.27::el8
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Red Hat Red Hat build of Quarkus 3.33.2.SP1     cpe:/a:redhat:quarkus:3.33::el8
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Red Hat Streams for Apache Kafka 2.9.4     cpe:/a:redhat:amq_streams:2.9::el9
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Red Hat Cryostat 4     cpe:/a:redhat:cryostat:4
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Red Hat OpenShift Serverless     cpe:/a:redhat:serverless:1
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Red Hat Red Hat AMQ Broker 7     cpe:/a:redhat:amq_broker:7
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Red Hat Red Hat AMQ Clients     cpe:/a:redhat:amq_clients:2023
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Red Hat Red Hat build of Apache Camel - HawtIO 4     cpe:/a:redhat:apache_camel_hawtio:4
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Red Hat Red Hat build of Apache Camel 4 for Quarkus 3     cpe:/a:redhat:camel_quarkus:3
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Red Hat Red Hat build of Apache Camel for Spring Boot 4     cpe:/a:redhat:camel_spring_boot:4
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Red Hat Red Hat build of Apicurio Registry 3     cpe:/a:redhat:apicurio_registry:3
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Red Hat Red Hat build of Debezium 3     cpe:/a:redhat:debezium:3
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Red Hat Red Hat Build of Keycloak     cpe:/a:redhat:build_keycloak:
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Red Hat Red Hat Data Grid 8     cpe:/a:redhat:jboss_data_grid:8
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Red Hat Red Hat Fuse 7     cpe:/a:redhat:jboss_fuse:7
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Red Hat Red Hat JBoss Enterprise Application Platform 7     cpe:/a:redhat:jboss_enterprise_application_platform:7
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Red Hat Red Hat JBoss Enterprise Application Platform 8     cpe:/a:redhat:jboss_enterprise_application_platform:8
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Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack     cpe:/a:redhat:jbosseapxp
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Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
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Red Hat Red Hat OpenShift Dev Spaces     cpe:/a:redhat:openshift_devspaces:3
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Red Hat streams for Apache Kafka 3     cpe:/a:redhat:amq_streams:3
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Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3     cpe:/a:redhat:enterprise_linux_ai:3
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Red Hat Red Hat Satellite 6     cpe:/a:redhat:satellite:6
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Red Hat Red Hat Single Sign-On 7     cpe:/a:redhat:red_hat_single_sign_on:7
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Show details on NVD website

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CVE-2026-5050 (GCVE-0-2026-5050)

Vulnerability from cvelistv5 – Published: 2026-04-16 05:29 – Updated: 2026-04-16 13:42
VLAI
Title
Payment Gateway for Redsys & WooCommerce Lite <= 7.0.0 - Improper Verification of Cryptographic Signature to Unauthenticated Payment Status Manipulation
Summary
The Payment Gateway for Redsys & WooCommerce Lite plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 7.0.0 due to successful_request() handlers calculating a local signature but not validating Ds_Signature from the request before accepting payment status across the Redsys, Bizum, and Google Pay gateway flows. This makes it possible for unauthenticated attackers to forge payment callback data and mark pending orders as paid when they know a valid order key and order amount, potentially allowing checkout completion and product or service fulfillment without a successful payment.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
Impacted products
Credits
Nguyen Ngoc Duc
Show details on NVD website

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CVE-2026-50634 (GCVE-0-2026-50634)

Vulnerability from cvelistv5 – Published: 2026-06-12 09:05 – Updated: 2026-06-12 15:10
VLAI
Title
Apache CXF: WS JSON request filter trusts metadata from an unvalidated first signature entry
Summary
A vulnerability in Apache CXF's JwsJsonContainerRequestFilter can be exploited to cause CXF to process metadata that was not authenticated by the accepted signature. This can bypass the application's assumption that accepted `Content-Type` or protected HTTP-header metadata came from a verified signature entry, and may steer downstream JAX-RS entity parsing or signed-header consistency checks. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fix this issue.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
Impacted products
Vendor Product Version
Apache Software Foundation Apache CXF Affected: 4.2.0 , < 4.2.2 (semver)
Affected: 0 , < 4.1.7 (semver)
Create a notification for this product.
Credits
Mitchell Benjamin / Revamp Studio.
Show details on NVD website

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CVE-2026-50721 (GCVE-0-2026-50721)

Vulnerability from cvelistv5 – Published: 2026-07-02 21:44 – Updated: 2026-07-02 21:44
VLAI
Title
IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload
Summary
Libreswan, via the function RSA_authenticate_hash_signature_raw_rsa(), did not correctly verify the length of the authentication hash when the SIG payload of an IKEv1 packet was encoded using PKCS #1 RSA Encryption as per RFC 2313. A remote attacker can use a variation on the Bleichenbacher attack to forge the SIG payload when small public exponents are being used (e.g., e=3), which could lead to impersonation. Additionally, a remote attacker, by encoding a shorter than expected hash in the SIG payload, could trigger an assertion leading to denial-of-service. The daemon aborts and restarts; continued exploitation causes sustained denial of service. Remote code execution is not possible. X.509 certificate verifications of remote IKE peers are not affected.
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
  • CWE-617 - Reachable Assertion
Assigner
Impacted products
Vendor Product Version
The Libreswan Project libreswan Affected: 0 , ≤ 5.3 (semver)
Unaffected: 5.3.1 (semver)
Create a notification for this product.
Credits
Yeonghyeon Choi Duyeong Kim Andrew Cagney (The Libreswan Team)
Show details on NVD website

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            "privilegesRequired": "NONE",
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        },
        {
          "other": {
            "content": {
              "description": "Vendor-assessed severity: Medium. Authentication bypass requires weak RSA exponents (e=3) which have been disallowed by most cryptographic libraries for over a decade. DoS is mitigated by automatic daemon restart.",
              "value": "MEDIUM"
            },
            "type": "vendorSeverity"
          }
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347: Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
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        },
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              "cweId": "CWE-617",
              "description": "CWE-617: Reachable Assertion",
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        "dateUpdated": "2026-07-02T21:44:09.423Z",
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          "url": "https://libreswan.org/security/CVE-2026-50721/CVE-2026-50721.txt"
        },
        {
          "name": "Libreswan CVE-2026-50721 Patches",
          "tags": [
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          "url": "https://libreswan.org/security/CVE-2026-50721/"
        },
        {
          "name": "Related: CVE-2026-50722 (IKEv2 variant)",
          "tags": [
            "related"
          ],
          "url": "https://libreswan.org/security/CVE-2026-50722/CVE-2026-50722.txt"
        },
        {
          "name": "RFC 2313 - PKCS #1: RSA Encryption Version 1.5",
          "tags": [
            "technical-description"
          ],
          "url": "https://www.rfc-editor.org/rfc/rfc2313"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
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              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eUpgrade to libreswan 5.3.1 or later. Patches for libreswan 4.15 and 5.3 are available at \u003ca href=\"https://libreswan.org/security/CVE-2026-50721/\"\u003ehttps://libreswan.org/security/CVE-2026-50721/\u003c/a\u003e\u003c/p\u003e"
            }
          ],
          "value": "Upgrade to libreswan 5.3.1 or later. Patches for libreswan 4.15 and 5.3 are available at https://libreswan.org/security/CVE-2026-50721/"
        }
      ],
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        "defects": [
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        "discovery": "EXTERNAL"
      },
      "taxonomyMappings": [
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          "taxonomyName": "ATT\u0026CK",
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          "lang": "en",
          "time": "2026-03-24T00:00:00.000Z",
          "value": "Libreswan notified of the issue via security@libreswan.org"
        },
        {
          "lang": "en",
          "time": "2026-06-16T00:00:00.000Z",
          "value": "Advanced notice given to supported customers and distributions"
        },
        {
          "lang": "en",
          "time": "2026-06-24T00:00:00.000Z",
          "value": "Public announcement and release of libreswan 5.3.1"
        }
      ],
      "title": "IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload",
      "workarounds": [
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          "lang": "en",
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              "type": "text/html",
              "value": "\u003cp\u003eIKEv1 only supports RSA-SHA1 (PKCS#1 Version 1.5) with public key authentication, so there is no way to disable the vulnerable code path within IKEv1. Migrate IKEv1 connections to IKEv2 where \u003ccode\u003eauthby=ecdsa\u003c/code\u003e or \u003ccode\u003eauthby=rsa-sha2\u003c/code\u003e can be configured. For static tunnel configurations (not Remote Access VPN Client groups), authentication can be changed to use PSK via \u003ccode\u003eauthby=secret\u003c/code\u003e after coordination with the remote peer.\u003c/p\u003e"
            }
          ],
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        }
      ],
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  },
  "cveMetadata": {
    "assignerOrgId": "d42dc95b-23f1-4e06-9076-20753a0fb0df",
    "assignerShortName": "libreswan",
    "cveId": "CVE-2026-50721",
    "datePublished": "2026-07-02T21:44:09.423Z",
    "dateReserved": "2026-06-05T16:10:05.751Z",
    "dateUpdated": "2026-07-02T21:44:09.423Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

No mitigation information available for this CWE.

CAPEC-463: Padding Oracle Crypto Attack

An adversary is able to efficiently decrypt data without knowing the decryption key if a target system leaks data on whether or not a padding error happened while decrypting the ciphertext. A target system that leaks this type of information becomes the padding oracle and an adversary is able to make use of that oracle to efficiently decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). In addition to performing decryption, an adversary is also able to produce valid ciphertexts (i.e., perform encryption) by using the padding oracle, all without knowing the encryption key.

CAPEC-475: Signature Spoofing by Improper Validation

An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.

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