CVE-2026-53938 OpenIDC cjose - Out of Bounds Read/Write

OpenIDC cjose < 0.6.2.5 contains a buffer overflow caused by lack of length validation on attacker-supplied encrypted_key in AES Key Wrap algorithms during JWE decryption, letting remote unauthenticated attackers cause heap corruption and denial of service, exploit requires crafted JWE input.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.24% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read/Write
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Published
9 September 2026
Updated
15 October 2026
Weakness
CWE-122

Vendor fix

Upgrade to cjose version 0.6.2.5 or later; alternatively, reject AES Key Wrap algorithms for untrusted JWEs.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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