CVE-2026-87732

{"id": "CVE-2026-87732", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-87732", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-09T13:11:34.596764Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.2, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.5}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "OCaml", "product": "mirage-crypto", "versions": [{"status": "affected", "version": "0", "lessThan": "2.2.0", "versionType": "semver"}], "packageURL": "pkg:opam/mirage-crypto", "defaultStatus": "unaffected"}]}], "published": "2026-09-09T05:18:20.277", "references": [{"url": "https://osv.dev/vulnerability/OSEC-2026-12", "source": "cve@mitre.org"}, {"url": "https://osv.dev/vulnerability/OSEC-2026-12", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "cve@mitre.org", "description": [{"lang": "en", "value": "CWE-347"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in the mirage-crypto package before 2.2.0 for OCaml. The AES.GCM.authenticate_decrypt_into and Chacha20.authenticate_decrypt_into functions write the decrypted plaintext into a caller-provided buffer and only then compares the tag. On a forged tag, the functions returns false, but the destination buffer already holds the full plaintext."}], "lastModified": "2026-09-09T16:04:24.933", "sourceIdentifier": "cve@mitre.org"}