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CWE-347
Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
CVE-2026-34240 (GCVE-0-2026-34240)
Vulnerability from cvelistv5 – Published: 2026-03-31 15:44 – Updated: 2026-04-01 14:03
VLAI
Title
jose vulnerable to untrusted JWK header key acceptance during signature verification
Summary
JOSE is a Javascript Object Signing and Encryption (JOSE) library. Prior to version 0.3.5+1, a vulnerability in jose could allow an unauthenticated, remote attacker to forge valid JWS/JWT tokens by using a key embedded in the JOSE header (jwk). The vulnerability exists because key selection could treat header-provided jwk as a verification candidate even when that key was not present in the trusted key store. Since JOSE headers are untrusted input, an attacker could exploit this by creating a token payload, embedding an attacker-controlled public key in the header, and signing with the matching private key. Applications using affected versions for token verification are impacted. This issue has been patched in version 0.3.5+1. A workaround for this issue involves rejecting tokens where header jwk is present unless that jwk matches a key already present in the application's trusted key store.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/appsup-dart/jose/security/advi… | x_refsource_CONFIRM |
| https://github.com/appsup-dart/jose/commit/b07799… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| appsup-dart | jose |
Affected:
< 0.3.5+1
|
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CVE-2026-34377 (GCVE-0-2026-34377)
Vulnerability from cvelistv5 – Published: 2026-03-31 14:05 – Updated: 2026-03-31 17:18
VLAI
Title
Zebra has a Consensus Failure due to Improper Verification of V5 Transactions
Summary
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-consensus version 5.0.1, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By matching a valid transaction's txid while providing invalid authorization data, a miner could cause vulnerable Zebra nodes to accept an invalid block, leading to a consensus split from the rest of the Zcash network. This would not allow invalid transactions to be accepted but could result in a consensus split between vulnerable Zebra nodes and invulnerable Zebra and Zcashd nodes. This issue has been patched in zebrad version 4.3.0 and zebra-consensus version 5.0.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/ZcashFoundation/zebra/security… | x_refsource_CONFIRM |
| https://github.com/ZcashFoundation/zebra/releases… | x_refsource_MISC |
| https://zfnd.org/zebra-4-3-0-critical-security-fi… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| ZcashFoundation | zebra |
Affected:
< 4.3.0
|
|
| ZcashFoundation | zebra-consensus |
Affected:
< 5.0.1
|
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CVE-2026-34840 (GCVE-0-2026-34840)
Vulnerability from cvelistv5 – Published: 2026-04-02 18:52 – Updated: 2026-04-02 20:20
VLAI
Title
OneUptime SSO: Multi-Assertion Identity Injection via Decoupled Signature Verification
Summary
OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, OneUptime's SAML SSO implementation (App/FeatureSet/Identity/Utils/SSO.ts) has decoupled signature verification and identity extraction. isSignatureValid() verifies the first <Signature> element in the XML DOM using xml-crypto, while getEmail() always reads from assertion[0] via xml2js. An attacker can prepend an unsigned assertion containing an arbitrary identity before a legitimately signed assertion, resulting in authentication bypass. This issue has been patched in version 10.0.42.
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/OneUptime/oneuptime/security/a… | x_refsource_CONFIRM |
| https://github.com/OneUptime/oneuptime/commit/2fd… | x_refsource_MISC |
| https://github.com/OneUptime/oneuptime/releases/t… | x_refsource_MISC |
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CVE-2026-3562 (GCVE-0-2026-3562)
Vulnerability from cvelistv5 – Published: 2026-03-13 20:37 – Updated: 2026-03-16 20:21
VLAI
Title
Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability
Summary
Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the ed25519_sign_open function. The issue results from improper verification of a cryptographic signature. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-28480.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_research-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Philips | Hue Bridge |
Affected:
1.73.1973146020
|
Date Public
2026-03-06 21:19
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CVE-2026-3564 (GCVE-0-2026-3564)
Vulnerability from cvelistv5 – Published: 2026-03-17 14:48 – Updated: 2026-03-18 03:55
VLAI
Title
ScreenConnect Instance Level Cryptographic Material Exposure
Summary
A condition in ScreenConnect may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios.
Severity
9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ConnectWise | ScreenConnect |
Affected:
All versions prior to 26.1
|
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CVE-2026-3706 (GCVE-0-2026-3706)
Vulnerability from cvelistv5 – Published: 2026-03-08 05:02 – Updated: 2026-04-22 18:54 Disputed X_Open Source
VLAI
Title
mkj Dropbear S Range Check curve25519.c unpackneg signature verification
Summary
A vulnerability was determined in mkj Dropbear up to 2025.89. Impacted is the function unpackneg of the file src/curve25519.c of the component S Range Check. This manipulation causes improper verification of cryptographic signature. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitability is considered difficult. The actual existence of this vulnerability is currently in question. Patch name: fdec3c90a15447bd538641d85e5a3e3ac981011d. To fix this issue, it is recommended to deploy a patch. The project maintainer explains: "Signature Malleability is not exploitable in SSH protocol. (...) [A] PoC doesn't exist for SSH implementation, but rather it's against the internal API."
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.349652 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.349652 | signaturepermissions-required |
| https://vuldb.com/?submit.765933 | third-party-advisory |
| https://github.com/mkj/dropbear/issues/406 | issue-tracking |
| https://github.com/mkj/dropbear/pull/407 | issue-trackingpatch |
| https://github.com/mkj/dropbear/commit/fdec3c90a1… | patch |
| https://github.com/str4d/ed25519-java/issues/82#i… | issue-tracking |
| https://github.com/mkj/dropbear/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mkj | Dropbear |
Affected:
2025.0
Affected: 2025.1 Affected: 2025.2 Affected: 2025.3 Affected: 2025.4 Affected: 2025.5 Affected: 2025.6 Affected: 2025.7 Affected: 2025.8 Affected: 2025.9 Affected: 2025.10 Affected: 2025.11 Affected: 2025.12 Affected: 2025.13 Affected: 2025.14 Affected: 2025.15 Affected: 2025.16 Affected: 2025.17 Affected: 2025.18 Affected: 2025.19 Affected: 2025.20 Affected: 2025.21 Affected: 2025.22 Affected: 2025.23 Affected: 2025.24 Affected: 2025.25 Affected: 2025.26 Affected: 2025.27 Affected: 2025.28 Affected: 2025.29 Affected: 2025.30 Affected: 2025.31 Affected: 2025.32 Affected: 2025.33 Affected: 2025.34 Affected: 2025.35 Affected: 2025.36 Affected: 2025.37 Affected: 2025.38 Affected: 2025.39 Affected: 2025.40 Affected: 2025.41 Affected: 2025.42 Affected: 2025.43 Affected: 2025.44 Affected: 2025.45 Affected: 2025.46 Affected: 2025.47 Affected: 2025.48 Affected: 2025.49 Affected: 2025.50 Affected: 2025.51 Affected: 2025.52 Affected: 2025.53 Affected: 2025.54 Affected: 2025.55 Affected: 2025.56 Affected: 2025.57 Affected: 2025.58 Affected: 2025.59 Affected: 2025.60 Affected: 2025.61 Affected: 2025.62 Affected: 2025.63 Affected: 2025.64 Affected: 2025.65 Affected: 2025.66 Affected: 2025.67 Affected: 2025.68 Affected: 2025.69 Affected: 2025.70 Affected: 2025.71 Affected: 2025.72 Affected: 2025.73 Affected: 2025.74 Affected: 2025.75 Affected: 2025.76 Affected: 2025.77 Affected: 2025.78 Affected: 2025.79 Affected: 2025.80 Affected: 2025.81 Affected: 2025.82 Affected: 2025.83 Affected: 2025.84 Affected: 2025.85 Affected: 2025.86 Affected: 2025.87 Affected: 2025.88 Affected: 2025.89 |
Credits
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CVE-2026-39413 (GCVE-0-2026-39413)
Vulnerability from cvelistv5 – Published: 2026-04-08 19:41 – Updated: 2026-04-22 15:28
VLAI
Title
LightRAG has a JWT Algorithm Confusion Vulnerability in LightRAG API
Summary
LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.4.14, the LightRAG API is vulnerable to a JWT algorithm confusion attack where an attacker can forge tokens by specifying 'alg': 'none' in the JWT header. Since the jwt.decode() call does not explicitly deny the 'none' algorithm, a crafted token without a signature will be accepted as valid, leading to unauthorized access. This vulnerability is fixed in 1.4.14.
Severity
4.2 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/HKUDS/LightRAG/security/adviso… | x_refsource_CONFIRM |
| https://github.com/github/advisory-database/issues/7373 |
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CVE-2026-40070 (GCVE-0-2026-40070)
Vulnerability from cvelistv5 – Published: 2026-04-09 17:26 – Updated: 2026-04-13 15:38
VLAI
Title
bsv-sdk and bsv-wallet persist unverified certifier signatures in acquire_certificate (direct and issuance paths)
Summary
BSV Ruby SDK is the Ruby SDK for the BSV blockchain. From 0.3.1 to before 0.8.2, BSV::Wallet::WalletClient#acquire_certificate persists certificate records to storage without verifying the certifier's signature over the certificate contents. In acquisition_protocol: 'direct', the caller supplies all certificate fields (including signature:) and the record is written to storage verbatim. In acquisition_protocol: 'issuance', the client POSTs to a certifier URL and writes whatever signature the response body contains, also without verification. An attacker who can reach either API (or who controls a certifier endpoint targeted by the issuance path) can forge identity certificates that subsequently appear authentic to list_certificates and prove_certificate.
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/sgbett/bsv-ruby-sdk/security/a… | x_refsource_CONFIRM |
| https://github.com/sgbett/bsv-ruby-sdk/issues/305 | x_refsource_MISC |
| https://github.com/sgbett/bsv-ruby-sdk/pull/306 | x_refsource_MISC |
| https://github.com/sgbett/bsv-ruby-sdk/commit/499… | x_refsource_MISC |
| https://brc.dev/52 | x_refsource_MISC |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| sgbett | bsv-ruby-sdk |
Affected:
>= 0.3.1, < 0.8.2
|
|
| sgbett | bsv-sdk |
Affected:
>= 0.3.1, < 0.8.2
|
|
| sgbett | bsv-wallet |
Affected:
>= 0.1.2, < 0.3.4
|
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CVE-2026-40372 (GCVE-0-2026-40372)
Vulnerability from cvelistv5 – Published: 2026-04-21 19:20 – Updated: 2026-06-29 12:34
VLAI
Title
ASP.NET Core Elevation of Privilege Vulnerability
Summary
Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.
Severity
9.1 (Critical)
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
| https://access.redhat.com/security/cve/CVE-2026-40372 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2460224 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | ASP.NET Core 10.0 |
Affected:
10.0 , < 10.0.7
(custom)
|
|
| Microsoft | Microsoft Visual Studio 2026 version 18.5 |
Affected:
18.5.0 , < 18.5.2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9 |
Date Public
2026-04-21 14:00
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CVE-2026-40941 (GCVE-0-2026-40941)
Vulnerability from cvelistv5 – Published: 2026-06-25 23:01 – Updated: 2026-06-26 14:57
VLAI
Title
Cacti: Package Import Signature Validation Bypass Allows Self-Signed Packages
Summary
Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have a package import signature validation bypass allows which allows self-signed packages. This issue has been fixed in version 1.2.31.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/Cacti/cacti/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/Cacti/cacti/pull/7054 | x_refsource_MISC |
| https://github.com/Cacti/cacti/releases/tag/relea… | x_refsource_MISC |
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"baseScore": 7.1,
"baseSeverity": "HIGH",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-347",
"description": "CWE-347: Improper Verification of Cryptographic Signature",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-25T23:01:30.937Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/Cacti/cacti/security/advisories/GHSA-274c-97hj-pv2v",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/Cacti/cacti/security/advisories/GHSA-274c-97hj-pv2v"
},
{
"name": "https://github.com/Cacti/cacti/pull/7054",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Cacti/cacti/pull/7054"
},
{
"name": "https://github.com/Cacti/cacti/releases/tag/release%2F1.2.31",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Cacti/cacti/releases/tag/release%2F1.2.31"
}
],
"source": {
"advisory": "GHSA-274c-97hj-pv2v",
"discovery": "UNKNOWN"
},
"title": "Cacti: Package Import Signature Validation Bypass Allows Self-Signed Packages"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-40941",
"datePublished": "2026-06-25T23:01:30.937Z",
"dateReserved": "2026-04-15T20:40:15.518Z",
"dateUpdated": "2026-06-26T14:57:48.522Z",
"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.