{"id":"JLSEC-2026-749","summary":"HMAC zero-length tag forgery in EVP_DigestVerifyFinal, where a zero-length tag could be accepted...","details":"HMAC zero-length tag forgery in EVP_DigestVerifyFinal, where a zero-length tag could be accepted as valid during HMAC verification. In the OpenSSL-compatibility HMAC verify path the supplied signature length was only checked as not exceeding the MAC length, so a zero-length or otherwise truncated tag could pass verification. The fix requires the supplied tag length to exactly equal the MAC length and rejects a zero-length MAC, so a forged short or empty tag is no longer accepted.","modified":"2026-07-18T00:02:22.659950649Z","published":"2026-07-14T21:41:35.775Z","upstream":["CVE-2026-6331","GHSA-5hpf-pc4x-3jcf","EUVD-2026-39565"],"database_specific":{"license":"CC-BY-4.0","sources":[{"imported":"2026-07-17T22:35:45.543Z","modified":"2026-06-27T19:48:56.343Z","published":"2026-06-25T22:17:03.010Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-6331","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6331","database_specific":{"status":"Analyzed"},"id":"CVE-2026-6331"},{"published":"2026-06-26T00:32:06Z","url":"https://api.github.com/advisories/GHSA-5hpf-pc4x-3jcf","html_url":"https://github.com/advisories/GHSA-5hpf-pc4x-3jcf","id":"GHSA-5hpf-pc4x-3jcf","imported":"2026-07-17T22:35:45.732Z","modified":"2026-06-27T21:30:29Z"},{"published":"2026-06-25T20:56:25Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-39565","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39565","id":"EUVD-2026-39565","imported":"2026-07-17T22:35:55.617Z","modified":"2026-06-26T13:53:06Z"}]},"references":[{"type":"WEB","url":"https://github.com/advisories/GHSA-5hpf-pc4x-3jcf"},{"type":"WEB","url":"https://github.com/wolfSSL/wolfssl/pull/10192"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6331"},{"type":"WEB","url":"https://www.wolfssl.com/docs/security-vulnerabilities"},{"type":"WEB","url":"https://www.wolfssl.com/docs/security-vulnerabilities/"}],"affected":[{"package":{"name":"wolfSSL_jll","ecosystem":"Julia","purl":"pkg:julia/wolfSSL_jll?uuid=98c43586-9870-5ae5-ab22-acc77b9bbdb5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.9.2+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-749.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}