{"id":"CVE-2025-11000","title":"Open Babel has out-of-bounds read in PQS lowerit (pre-buffer read)","summary":"Open Babel has out-of-bounds read in PQS lowerit (pre-buffer read)","severity":"medium","cvss":4.4,"cwe":["CWE-125","CWE-404"],"vendor":"openbabel","product":"openbabel","ecosystem":"pip","affected":["openbabel < 3.2.0"],"patched":["openbabel 3.2.0"],"published":"2026-07-01","updated":"2026-07-01","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-m982-7q3h-r784","references":[{"url":"https://github.com/openbabel/openbabel/security/advisories/GHSA-m982-7q3h-r784"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-11000"},{"url":"https://github.com/openbabel/openbabel/issues/2826"},{"url":"https://github.com/openbabel/openbabel/commit/f4a5ebae"},{"url":"https://github.com/user-attachments/files/22318474/poc.zip"},{"url":"https://vuldb.com/?ctiid.325928"},{"url":"https://vuldb.com/?id.325928"},{"url":"https://vuldb.com/?submit.654066"},{"url":"https://github.com/advisories/GHSA-m982-7q3h-r784"}],"tags":["ghsa","pip"],"epss":0.0024,"epssPercentile":0.15459,"ingestedAt":"2026-07-01T18:15:20.589Z","slug":"CVE-2025-11000","body":"## Overview\n\n### 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.\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":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}