{"id":"CVE-2025-11000","aliases":["GHSA-m982-7q3h-r784","PYSEC-2026-2785"],"url":"https://o3.security/vulnerability/CVE-2025-11000","summary":"Open Babel PQSformat.cpp ReadMolecule null pointer dereference","details":"### Summary\n\nA memory-safety vulnerability in Open Babel's PQS parser caused an\nout-of-bounds (pre-buffer) read when reading a crafted input file.\n\n### Details\n\nThe flaw was in the `lowerit` helper used by the PQS parser. A\nmalformed input caused the helper to read one or more bytes before\nthe start of its input buffer.\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 open a malicious PQS file with the `obabel`\ntool, the `OBConversion` API, or any of the language bindings (Python,\nRuby, Java, R, Perl, C#, PHP).\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/f4a5ebae\nFixes 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":"2025-09-26T03:32:05.999Z","modified":"2026-10-24T02:30:29.614255918Z","cvss":null,"epss":{"score":0.0024,"percentile":0.15376,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"openbabel","fixedVersion":"3.2.0"}],"fix":{"url":"https://github.com/openbabel/openbabel/commit/f4a5ebae","label":"openbabel/openbabel@f4a5eba"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/11xxx/CVE-2025-11000.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-11000"},{"type":"ADVISORY","url":"https://vuldb.com/?id.325928"},{"type":"ADVISORY","url":"https://vuldb.com/?submit.654066"},{"type":"REPORT","url":"https://github.com/openbabel/openbabel/issues/2826"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.325928"},{"type":"EVIDENCE","url":"https://github.com/user-attachments/files/22318474/poc.zip"},{"type":"WEB","url":"https://github.com/openbabel/openbabel/security/advisories/GHSA-m982-7q3h-r784"},{"type":"WEB","url":"https://github.com/openbabel/openbabel/commit/f4a5ebae"},{"type":"PACKAGE","url":"https://github.com/openbabel/openbabel"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T02:30:29.614255918Z"}}