{"id":"JLSEC-2026-1259","summary":"In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of...","details":"In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls `gss_accept_sec_context()` on a system with a NegoEx mechanism registered in `/etc/gss/mech`. An unauthenticated remote attacker can trigger this, possibly causing the process to terminate in `parse_message`.","modified":"2026-08-12T14:58:45.747483150Z","published":"2026-08-12T14:29:53.019Z","upstream":["CVE-2026-40356","EUVD-2026-25993","GHSA-f7p3-6rhj-p7jv"],"database_specific":{"license":"CC-BY-4.0","sources":[{"id":"CVE-2026-40356","imported":"2026-08-12T12:42:57.124Z","modified":"2026-07-08T12:48:10.117Z","published":"2026-04-28T07:16:03.197Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-40356","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40356","database_specific":{"status":"Analyzed"}},{"imported":"2026-08-12T12:43:00.504Z","modified":"2026-04-28T09:34:19Z","published":"2026-04-28T09:34:12Z","url":"https://api.github.com/advisories/GHSA-f7p3-6rhj-p7jv","html_url":"https://github.com/advisories/GHSA-f7p3-6rhj-p7jv","id":"GHSA-f7p3-6rhj-p7jv"},{"id":"EUVD-2026-25993","imported":"2026-08-12T12:42:58.483Z","modified":"2026-04-28T13:10:24Z","published":"2026-04-28T00:00:00Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-25993","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-25993"}]},"references":[{"type":"WEB","url":"https://cems.fun/2026/04/27/krb5-two-unauthenticated-network-vulnerabilities.html"},{"type":"WEB","url":"https://github.com/advisories/GHSA-f7p3-6rhj-p7jv"},{"type":"WEB","url":"https://github.com/krb5/krb5/commit/2e75f0d9362fb979f5fc92829431a590a130929f"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40356"},{"type":"WEB","url":"https://web.mit.edu/kerberos/advisories"},{"type":"WEB","url":"https://web.mit.edu/kerberos/advisories/"}],"affected":[{"package":{"name":"Kerberos_krb5_jll","ecosystem":"Julia","purl":"pkg:julia/Kerberos_krb5_jll?uuid=b39eb1a6-c29a-53d7-8c32-632cd16f18da"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1259.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}