CVE-2026-102272

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{"bugzilla": {"description": "pyjwt: pyjwt: Token forgery via improper Unicode byte-order mark handling", "id": "2542695", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542695"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-347", "details": ["A flaw was found in pyjwt. When verifying cryptographic keys, the raw JSON Web Key (JWK) parser fails to normalize Unicode byte-order marks (BOM). In mixed-algorithm verification environments, an attacker who knows the public key can supply a key prefixed with a byte-order mark, causing the system to misidentify the public key as a shared symmetric secret. This flaw allows an attacker to forge authenticated JSON Web Tokens (JWT) and bypass authentication controls."], "name": "CVE-2026-102272", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "jaeger", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "llvm21", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "rust", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "swift-lang", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-09-28T20:36:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-102272\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-102272\nhttps://github.com/jpadilla/pyjwt/commit/180783930de91876bc0d601f826a1f2956057291\nhttps://github.com/jpadilla/pyjwt/releases/tag/2.14.0\nhttps://github.com/jpadilla/pyjwt/security/advisories/GHSA-r6x4-923q-g947"], "threat_severity": "Important"}

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