What’s Vulnerable › Vulnerabilities

CVE-2026-80179: Jwcrypto: jwcrypto: denial of service via malformed jwe tokens

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-08-31
• Weakness: CWE-770

Description

A flaw was found in jwcrypto. A remote attacker can send a specially crafted JSON Web Encryption (JWE) token containing numerous period delimiters. This malformed token can force the JWE.deserialize() function to allocate excessive memory, leading to a MemoryError. This issue results in a denial of service (DoS) for services that process untrusted JWE values.

Affected products

• Red Hat Ansible Automation Platform 2: all versions
• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 9: all versions
• Red Hat OpenShift AI (RHOAI): all versions
• Red Hat OpenStack Platform 16.2: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-80179
• https://bugzilla.redhat.com/show_bug.cgi?id=2524147
• https://github.com/latchset/jwcrypto/security/advisories/GHSA-96rv-c4vc-h4f4
• https://github.com/latchset/jwcrypto/security/advisories/GHSA-96rv-c4vc-h4f4

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