{"id":"CVE-2025-10996","title":"Open Babel has heap buffer overflow in SMILES OBSmilesParser::ParseSmiles","summary":"Open Babel has heap buffer overflow in SMILES OBSmilesParser::ParseSmiles","severity":"high","cvss":7.8,"cwe":["CWE-119"],"vendor":"openbabel","product":"openbabel","ecosystem":"pip","affected":["openbabel < 3.2.0"],"patched":["openbabel 3.2.0"],"published":"2026-06-30","updated":"2026-06-30","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-j35x-w4gj-pf7w","references":[{"url":"https://github.com/openbabel/openbabel/security/advisories/GHSA-j35x-w4gj-pf7w"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-10996"},{"url":"https://github.com/openbabel/openbabel/issues/2831"},{"url":"https://github.com/openbabel/openbabel/pull/2913"},{"url":"https://github.com/openbabel/openbabel/commit/b34cd604"},{"url":"https://github.com/user-attachments/files/22318556/poc.zip"},{"url":"https://vuldb.com/?ctiid.325924"},{"url":"https://vuldb.com/?id.325924"},{"url":"https://vuldb.com/?submit.654060"},{"url":"https://github.com/advisories/GHSA-j35x-w4gj-pf7w"}],"tags":["ghsa","pip"],"epss":0.0028,"epssPercentile":0.20664,"ingestedAt":"2026-06-30T21:50:09.513Z","slug":"CVE-2025-10996","body":"## Overview\n\n### 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.\n\n## Affected packages\n\n- `openbabel < 3.2.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `openbabel 3.2.0`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}