CVE-2026-5194

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{"bugzilla": {"description": "wolfSSL: wolfSSL: Reduced security of ECDSA authentication via missing digest size checks", "id": "2457041", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457041"}, "csaw": false, "cvss3": {"cvss3_base_score": "10.0", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-295", "details": ["A flaw was found in wolfSSL. Missing hash/digest size and Object Identifier (OID) checks allow the acceptance of smaller, less secure digests during the verification of Elliptic Curve Digital Signature Algorithm (ECDSA) certificates. This could enable a remote attacker, with knowledge of the public Certificate Authority (CA) key, to weaken the security of ECDSA certificate-based authentication. The vulnerability affects ECDSA/ECC verification when EdDSA or ML-DSA are also enabled."], "name": "CVE-2026-5194", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "mariadb10.11/mariadb10.11", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "mariadb11.8/mariadb11.8", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-04-09T19:30:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-5194\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-5194\nhttps://github.com/wolfSSL/wolfssl/pull/10131"], "statement": "This vulnerability doesn't affect any versions of MariaDB as shipped with Red Hat Products. For Red Hat products MariaDB is compiled and linked against the system's OpenSSL library instead of using the MariaDB's bundled WolfSSL library routines.", "threat_severity": "Critical"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.12.0,5.9.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "wolfSSL", "source": "cna", "vendor": "wolfSSL"}, "product": "wolfssl", "vendor": "wolfssl"}], "analysis": {"en": {"generated_at": "2026-04-09T21:24:07.077989+00:00", "value": {"mitigation_remediation": ["Upgrade the wolfSSL library to a version that includes the fix for digest size and OID validation in ECDSA certificate verification (see the pull request linked in the advisory).", "If an upgrade is not immediately possible, consider disabling ECDSA certificate verification or applying application-level checks for digest size compatibility until the library is updated."], "summary": {"action": "Immediate Patch", "impact": "Certificate Authentication Bypass"}, "threat_synthesis": {"affected_systems": "All deployments that use the wolfSSL library, particularly those that rely on ECDSA or ECC certificate verification without explicit size checks. No specific version ranges are listed, so any installation of wolfSSL that has not yet incorporated the patch linked in the advisory is potentially affected.", "description_and_impact": "The vulnerability arises because wolfSSL does not verify the hash or digest size and OID when checking ECDSA certificates. As a result, signatures with digests smaller than the algorithm requires can be wrongly accepted. If an attacker can supply a certificate that uses such a reduced digest, they may be able to forge authentication requests that pass verification. The weakness is a classic checksum or hash check bypass, classified as CWE\u2011295.", "risk_and_exploitability": "The CVSS score of 9.3 indicates a high overall risk to confidentiality and integrity. While no EPSS score is provided, the lack of a KEV listing suggests it has not yet been widely exploited, but the severity and the fact that the flaw allows a bypass of certificate verification implies that exploitation is feasible in environments where wolfSSL is used for secure communications. The likely attack vector is via a malicious certificate presented during a TLS handshake or equivalent certificate-based authentication process. Successful exploitation would grant an attacker the ability to impersonate a trusted party in the system."}}}}, "created": "2026-04-10T08:38:51.579499+00:00", "updated": "2026-04-10T09:29:35.547491+00:00", "vendors": ["wolfssl", "wolfssl$PRODUCT$wolfssl"]}