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CVE PROGRAM SOURCE RECORD5.9 Medium

CVE-2026-65628

Infinite recursion (CPU denial-of-service) in JOSE.JWK.shared_secret/2 on mismatched key types

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Status
Published
Published
Updated
Assigning organization
EEF

Description

jose_jwk:shared_secret/2 (exposed in Elixir as JOSE.JWK.shared_secret/2) derives an ECDH shared secret from two JWKs. Its first function clause only matches when both JWKs carry the same key type (kty) module, and its fallback clause re-invokes itself as shared_secret(from(YourJWK), from(MyJWK)). Because from/1 returns an already-parsed jose_jwk record unchanged, passing two JWKs whose key types differ (for example an EC key and an RSA key) makes the fallback clause re-enter with identical arguments, producing an unbounded tail-recursive loop that never returns and never crashes. An application that derives a shared secret from an externally supplied peer public key without first checking that the peer key's type and curve match its own key can be driven into this loop by an attacker-controlled JWK, pinning an Erlang scheduler at 100% CPU. Repeated requests exhaust the available schedulers, resulting in a denial of service. This issue affects jose: from 1.5.0 before 1.11.13.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

potatosalad jose

Default version status: unaffected

  • 1.5.0 to < 1.11.13affected
pkg:hex/jose

potatosalad jose

Default version status: unaffected

  • 7b80b9f55b9898e1a6901ce136061b241b021d7c to < 26182a7de63b91550035d3f08741f7d17f1f675aaffected
pkg:github/potatosalad/erlang-jose

References