## Go JOSE: DoS when parsing JWKs that contain RSA keys

- 種別: advisory
- 重大度: high
- 関連技術: go, github
- CVE: CVE-2026-116587
- 公開日時: 2026-10-27T19:01:30.000Z
- 情報源: GitHub Advisory Database (https://github.com/advisories/GHSA-mgcc-cww5-fp2q)
- パーマリンク: https://vulnpulse.app/items/ghsa-ghsa-mgcc-cww5-fp2q

影響: go:github.com/go-jose/go-jose/v4 <= 4.1.5 → 4.1.6, go:github.com/go-jose/go-jose/v3 <= 3.0.5
A crafted RSA key inside a JWK can cause operations that parse JWKs to consume excess CPU. Details go-jose does not check for bounds on RSA modulus and primes before validating them. Values are passed directly to crypto/rsa.PrivateKey.Validate(). On Go 1.24+, this takes cubic time complexity with respect to the RSA modulus and primes. This allows an attacker to supply a crafted JWK to consume excessive CPU. https://github.com/go-jose/go-jose/blob/5b371aecfcf7aabe06068d67da4344591ecddc76/jwk.go#…