CVE-2026-65629 Affecting erlang-jose package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-ERLANGJOSE-21757334
- published28 Oct 2026
- disclosed26 Oct 2026
Introduced: 26 Oct 2026
NewCVE-2026-65629 (opens in a new tab)How to fix?
There is no fixed version for Debian:unstable erlang-jose.
NVD Description
Note: Versions mentioned in the description apply only to the upstream erlang-jose package and not the erlang-jose package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Use of Password Hash With Insufficient Computational Effort in the jose library allows an attacker who obtains a password-encrypted private-key export to recover the private key through an offline password-cracking attack.
When jose exports a password-encrypted private key with jose_jwk:to_der/2 (JOSE.JWK.to_der/2), the jose_jwk_der:to_binary/3 function in src/jwk/jose_jwk_der.erl serializes the key as a PKCS#8 EncryptedPrivateKeyInfo using the PBES2 scheme with hardcoded key-derivation parameters: PBKDF2-HMAC-SHA256 with an iteration count of 2048 and an 8-byte (64-bit) random salt. Neither value can be overridden by the caller.
Both values are far below current guidance (OWASP recommends on the order of 600,000 iterations for PBKDF2-HMAC-SHA256, and NIST recommends salts of at least 128 bits), so the key-stretching work factor is roughly 300 times lower than intended and the short salt reduces the cost of precomputation across keys. The symmetric encryption (AES-256-CBC with a 16-byte random IV) is not affected; the weakness is entirely in the derivation strength. An attacker who obtains one of these exported blobs (for example from a backup, configuration repository, object storage, or logs) can mount a cheap offline dictionary or brute-force attack against the export password, and success yields the full private key.
This issue affects jose: from 1.10.0 before 1.11.13.
References
- https://security-tracker.debian.org/tracker/CVE-2026-65629
- https://cna.erlef.org/cves/CVE-2026-65629.html
- https://github.com/potatosalad/erlang-jose/commit/461b261902531ca016190e780bb70862d561a7e0
- https://github.com/potatosalad/erlang-jose/commit/85fddd89ee56b6f9c19eff7d9cfffeef62c330b9
- https://github.com/potatosalad/erlang-jose/security/advisories/GHSA-h4gx-8jq2-mfhc
- https://osv.dev/vulnerability/EEF-CVE-2026-65629