{"vulnerability": "CVE-2026-12803", "sightings": [{"uuid": "f129da73-0b37-486d-9786-257c77ac11be", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-12803", "type": "seen", "source": "https://infosec.exchange/users/harrysintonen/statuses/117036528234088485", "content": "Bouncy Castle Java 1.85 has been released. It includes fixes to various rather significant vulnerabilities and weaknesses. Some highlights:\n- CVE-2026-8763 - Name Constraints bypass via trailing dot in rfc822Name and URI.- CVE-2026-12803 - KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce AEAD forgery).- CVE-2026-12816 - IESEngine stream-mode MAC forgery via length-dependent KDF split.- CVE-2026-58061 - CCM-family modes write plaintext to caller buffer before tag check.- CVE-2026-58062 - Stapled OCSP response accepted without binding to the checked certificate.- CVE-2026-59639 - CMS verifySignatures returns true for SignedData with zero signers.\nhttps://www.bouncycastle.org/resources/new-release-bouncy-castle-java-1-85/\n#infosec #cybersecurity", "creation_timestamp": "2026-08-04T09:28:17.850324Z"}, {"uuid": "eedcb732-e3e1-4ee1-b166-394897d9da43", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "86ecb4e1-bb32-44d5-9f39-8a4673af8385", "vulnerability": "CVE-2026-12803", "type": "seen", "source": "https://www.incibe.es/incibe-cert/alerta-temprana/vulnerabilidades/cve-2026-12803", "content": "", "creation_timestamp": "2026-08-03T11:22:47.388195Z"}, {"uuid": "1a281e7d-d910-437f-bbce-9f0dd5273d4e", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-12803", "type": "seen", "source": "https://bsky.app/profile/cve.skyfleet.blue/post/2igor6ykz2if6", "content": "CVE-2026-12803 - KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce AEAD forgery)\nCVE ID : CVE-2026-12803\n \n Published : Aug. 3, 2026, 4:16 a.m. | 1\u00a0hour, 39\u00a0minutes ago\n \n Description : In Bouncy Castle for Java before 1.85, KCCMBlockCipher MAC does not b...", "creation_timestamp": "2026-08-03T06:09:53.130940Z"}]}