{"id":"CVE-2026-116587","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-116587","generatedAt":"2026-10-28T05:28:12.016Z","title":"Prior to 4.1.6, go-jose parses attacker-controlled RSA modulus and prime values from JWKs without enforcing size and consistency bounds before passing them to crypto/rsa.PrivateKey.Validate.","description":"Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption (JWE), JSON Web Signature (JWS), and JSON Web Token (JWT) standards. Prior to 4.1.6, go-jose parses attacker-controlled RSA modulus and prime values from JWKs without enforcing size and consistency bounds before passing them to crypto/rsa.PrivateKey.Validate. On Go 1.24 and later, crafted large or degenerate RSA parameters can make that validation consume cubic CPU time, allowing remote denial of service in applications that parse JWKs from untrusted sources. This issue is fixed in version 4.1.6.","published":"2026-10-26T22:16:55.000Z","lastModified":"2026-10-27T15:16:41.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-407","CWE-770"],"affected":[],"epss":{"score":0.00366,"percentile":0.30289,"date":"2026-10-27","history":[{"date":"2026-10-27","score":0.00366,"percentile":0.30289}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-26T22:16:55.000Z","detail":{"score":"7.5","severity":"HIGH","publishedAt":"2026-10-26T22:16:55.193Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://github.com/go-jose/go-jose/commit/a0111f82742fa92bceec9ede40845e73319e6230","source":"security-advisories@github.com"},{"url":"https://github.com/go-jose/go-jose/releases/tag/v4.1.6","source":"security-advisories@github.com"},{"url":"https://github.com/go-jose/go-jose/security/advisories/GHSA-mgcc-cww5-fp2q","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-116587","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}