{"id":"CVE-2026-65629","published":"2026-10-26T20:17:58.647","lastModified":"2026-10-26T20:17:58.647","description":"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.\n\nWhen 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.\n\nBoth 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.\n\nThis issue affects jose: from 1.10.0 before 1.11.13.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-916"],"vendors":[],"products":[],"references":[{"url":"https://cna.erlef.org/cves/CVE-2026-65629.html","tags":[]},{"url":"https://github.com/potatosalad/erlang-jose/commit/461b261902531ca016190e780bb70862d561a7e0","tags":[]},{"url":"https://github.com/potatosalad/erlang-jose/commit/85fddd89ee56b6f9c19eff7d9cfffeef62c330b9","tags":[]},{"url":"https://github.com/potatosalad/erlang-jose/security/advisories/GHSA-h4gx-8jq2-mfhc","tags":[]},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-65629","tags":[]}],"exploitRefs":[{"url":"https://github.com/potatosalad/erlang-jose/commit/461b261902531ca016190e780bb70862d561a7e0","tags":[]},{"url":"https://github.com/potatosalad/erlang-jose/commit/85fddd89ee56b6f9c19eff7d9cfffeef62c330b9","tags":[]},{"url":"https://github.com/potatosalad/erlang-jose/security/advisories/GHSA-h4gx-8jq2-mfhc","tags":[]}],"hasPoc":true,"ai":null}