Vulnerability-Lookup

alsa-2026:47085

Vulnerability from osv_almalinux

Published

2026-07-28 00:00

Modified

2026-07-29 12:49

Summary

Important: rest security update

Details

The rest packages provide a library for access to the RESTful web services.

Security Fix(es):

librest: weak random number generation in PKCE implementation (CVE-2026-16615)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:47085	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-16615	REPORT
	https://bugzilla.redhat.com/2504432	REPORT
	https://errata.almalinux.org/10/ALSA-2026-47085.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "rest"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.1-11.el10_2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "rest-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.1-11.el10_2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "The rest packages provide a library for access to the RESTful web services.  \n\nSecurity Fix(es):  \n\n  * librest: weak random number generation in PKCE implementation (CVE-2026-16615)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:47085",
  "modified": "2026-07-29T12:49:57Z",
  "published": "2026-07-28T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:47085"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-16615"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2504432"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-47085.html"
    }
  ],
  "related": [
    "CVE-2026-16615"
  ],
  "summary": "Important: rest security update"
}

CVE-2026-16615 (GCVE-0-2026-16615)

Vulnerability from cvelistv5 – Published: 2026-07-22 16:12 – Updated: 2026-07-31 13:58

Title

Librest: weak random number generation in pkce implementation

Summary

A flaw was found in librest. The PKCE implementation for OAuth authorization uses the GRand function from the GLib API, a cryptographically insecure pseudo-random number generator. Because the generated "code verifier" lacks sufficient cryptographic entropy, a malicious actor can reverse-engineer the pseudo-random number generator (PRNG) seed to predict or reconstruct the code verifier string, allowing an attacker to bypass PKCE protections and successfully impersonate the client during the OAuth 2.0 authorization flow.

Severity

6.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-22 16:43 UTC

CWE

CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Assigner

redhat

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:47085	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-16615	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2504432	issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/librest/-/issues/25

Impacted products

2 products

Vendor	Product	Version
GNOME	librest
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:0.9.1-11.el10_2.1 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2

Date Public

2026-06-08 00:00

Credits

Red Hat would like to thank Cole Blakley for reporting this issue.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

alsa-2026:47085

Vulnerability from osv_almalinux

CVE-2026-16615 (GCVE-0-2026-16615)

Tags

Sightings

Nomenclature