{"id":"PYSEC-2026-2771","summary":"Open Babel has out-of-bounds write in MOPAC translationVectors[] (UNIT CELL TRANSLATION)","details":"### Summary\n\nA memory-safety vulnerability in Open Babel's MOPAC output parser\nallowed an out-of-bounds write into the `translationVectors[]` array\nwhen reading the \"UNIT CELL TRANSLATION\" block of a crafted input\nfile.\n\n### Details\n\nThe MOPAC output reader stored translation vectors from the UNIT CELL\nTRANSLATION block into a fixed-size `translationVectors[]` array. A\nmalformed block could push more vectors than the array had slots,\ncausing a write past the end of the array. One of five\n`translationVectors[]` OOB writes in the TALOS 2022 batch.\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 MOPAC output file with the\n`obabel` tool, the `OBConversion` API, or any of the language\nbindings (Python, Ruby, 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/40e85213\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 by Cisco TALOS.","aliases":["CVE-2022-46292","GHSA-55f6-pf8r-c2f4"],"modified":"2026-07-13T16:32:05.788302313Z","published":"2026-07-13T15:46:27.963877Z","references":[{"type":"WEB","url":"https://github.com/openbabel/openbabel/security/advisories/GHSA-55f6-pf8r-c2f4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-46292"},{"type":"WEB","url":"https://github.com/openbabel/openbabel/commit/40e852138f21d586b7ccdce6329e7b23a87168bb"},{"type":"PACKAGE","url":"https://github.com/openbabel/openbabel"},{"type":"WEB","url":"https://talosintelligence.com/vulnerability_reports/TALOS-2022-1666"},{"type":"WEB","url":"https://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1666"},{"type":"PACKAGE","url":"https://pypi.org/project/openbabel"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-55f6-pf8r-c2f4"}],"affected":[{"package":{"name":"openbabel","ecosystem":"PyPI","purl":"pkg:pypi/openbabel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.0"}]}],"versions":["1.8","1.8.1","1.8.2","1.8.3","1.8.4","2.4.0","2.4.1","3.0.0","3.0.0a1","3.1.1","3.1.1.1"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/openbabel/PYSEC-2026-2771.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}