{"id":"CVE-2026-81699","aliases":["GHSA-phmr-p567-q5g6"],"url":"https://o3.security/vulnerability/CVE-2026-81699","summary":"openssl_encrypt before 1.4.9 Denial of Service via unbounded KDF cost","details":"openssl_encrypt versions before 1.4.9 fail to properly validate key derivation function costs in crafted files, allowing attackers to trigger unbounded memory and CPU exhaustion during pre-authentication processing. Attackers can supply malicious files with excessive KDF parameters to exhaust system resources and crash or wedge the process before password verification occurs.","published":"2026-08-27T14:51:03.419Z","modified":"2026-08-28T03:47:10.924786435Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81699.json"},{"type":"ADVISORY","url":"https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-phmr-p567-q5g6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81699"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-denial-of-service-via-unbounded-kdf-cost"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-28T03:47:10.924786435Z"}}