EEF-CVE-2026-65628

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Source

https://cna.erlef.org/osv/EEF-CVE-2026-65628.html

Import Source

https://cna.erlef.org/osv/EEF-CVE-2026-65628.json

JSON Data

https://api.osv.dev/v1/vulns/EEF-CVE-2026-65628

Aliases

CVE-2026-65628
GHSA-fpj2-9h59-32pp

Published

2026-10-26T19:53:27Z

Modified

2026-10-26T20:11:08Z

Severity

5.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

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

Details

Summary

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.

Workarounds

Before calling JOSE.JWK.shared_secret/2, verify that the externally supplied peer key's type (kty) and curve match your own key, and reject any key whose type does not match before attempting derivation.

Database specific

{
    "capec_ids":  [
        "CAPEC-130"
    ],
    "cpe_ids":  [
        "cpe:2.3:a:potatosalad:jose:*:*:*:*:*:*:*:*"
    ],
    "cwe_ids":  [
        "CWE-674"
    ]
}

References

Credits

- Peter Ullrich - REPORTER
- Andrew Bennett - REMEDIATION_DEVELOPER
- Jonatan Männchen / EEF - ANALYST

Affected packages

Hex / jose

Package

Name: jose
Purl: pkg:hex/jose

Affected ranges

Type: SEMVER
Events: Introduced

1.5.0

Fixed

1.11.13

Affected versions

1.*

1.5.0

1.5.1

1.5.2

1.6.0

1.6.1

1.7.0

1.7.1

1.7.2

1.7.3

1.7.4

1.7.5

1.7.6

1.7.7

1.7.8

1.7.9

1.8.0

1.8.1

1.8.2

1.8.3

1.8.4

1.9.0

1.10.0

1.10.1

1.11.0

1.11.1

1.11.2

1.11.4

1.11.5

1.11.6

1.11.7

1.11.8

1.11.9

1.11.10

1.11.11

1.11.12

Database specific

source

"https://cna.erlef.org/osv/EEF-CVE-2026-65628.json"

Git / github.com/potatosalad/erlang-jose