{"id":"CVE-2025-10996","aliases":["GHSA-j35x-w4gj-pf7w","PYSEC-2026-2781"],"url":"https://o3.security/vulnerability/CVE-2025-10996","summary":"Open Babel smilesformat.cpp ParseSmiles heap-based overflow","details":"### Summary\n\nA memory-safety vulnerability in Open Babel's SMILES parser caused a\nheap buffer overflow when reading a crafted input string.\n\n### Details\n\nThe flaw was in `OBSmilesParser::ParseSmiles`. A malformed SMILES\ninput caused the parser to write past the end of a heap-allocated\nbuffer.\n\n### Impact\n\nOpen Babel is a C++ library and CLI used to read and write chemistry\nfile formats; it is shipped by Linux distributions and embedded in\nservices that may parse untrusted input. Triggering this vulnerability\nrequires the victim to parse a malicious SMILES string with the\n`obabel` tool, the `OBConversion` API, or any of the language\nbindings (Python, Ruby, Java, R, Perl, C#, PHP). SMILES strings are\ncommonly passed on the command line and through scripted pipelines,\nso this primitive is especially reachable.\n\n### Affected versions\n\nAll releases up to and including 3.1.1.\n\n### Patched version\n\n3.2.0 (released 2026-05-26).\n\n### Patch\n\nFix commit: https://github.com/openbabel/openbabel/commit/b34cd604\nOriginally reported as #2831; fixes consolidated in #2913.\n\nA minimized reproducer for this CVE is checked in under\n`test/files/fuzz_regress/` and is exercised on every CI build under\nASAN+UBSAN by the `fuzzregresstest` harness.\n\n### Credit\n\nReported via OSS-Fuzz.","published":"2025-09-26T02:32:06.533Z","modified":"2026-08-12T03:51:13.477524405Z","cvss":null,"epss":{"score":0.0028,"percentile":0.20521,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"openbabel","fixedVersion":"3.2.0"}],"fix":{"url":"https://github.com/openbabel/openbabel/pull/2913","label":"openbabel/openbabel#2913"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/10xxx/CVE-2025-10996.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-10996"},{"type":"ADVISORY","url":"https://vuldb.com/?id.325924"},{"type":"ADVISORY","url":"https://vuldb.com/?submit.654060"},{"type":"REPORT","url":"https://github.com/openbabel/openbabel/issues/2831"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.325924"},{"type":"EVIDENCE","url":"https://github.com/user-attachments/files/22318556/poc.zip"},{"type":"WEB","url":"https://github.com/openbabel/openbabel/security/advisories/GHSA-j35x-w4gj-pf7w"},{"type":"WEB","url":"https://github.com/openbabel/openbabel/pull/2913"},{"type":"WEB","url":"https://github.com/openbabel/openbabel/commit/b34cd604"},{"type":"PACKAGE","url":"https://github.com/openbabel/openbabel"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:13.477524405Z"}}