PT-2026-59429 · Pypi · Open Babel

Published 2026-07-13 · Updated 2026-07-13

OSV

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

A memory-safety vulnerability in Open Babel's ORCA parser allowed an out-of-bounds write when reading a crafted input file.

Details

The flaw was in the nAtoms handling of the ORCA reader. A malformed input caused the parser to write past the end of its destination buffer.

Impact

Open Babel is a C++ library and CLI used to read and write chemistry file formats; it is shipped by Linux distributions and embedded in services that may parse untrusted input. Triggering this vulnerability requires the victim to open a malicious ORCA file with the obabel tool, the OBConversion API, or any of the language bindings (Python, Ruby, Java, R, Perl, C#, PHP).

Affected versions

All releases up to and including 3.1.1.

Patched version

3.2.0 (released 2026-05-26).

Patch

Fix commit: https://github.com/openbabel/openbabel/commit/b239d06e

A minimized reproducer for this CVE is checked in under test/files/fuzz regress/ and is exercised on every CI build under ASAN+UBSAN by the fuzzregresstest harness.

Credit

Reported by Cisco TALOS.

Fix

Related Identifiers

PYSEC-2026-2790

Affected Products

Open Babel

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2022-46289 · Security Note
• https://osv.dev/vulnerability/PYSEC-2026-2790 · Vendor Advisory
• https://github.com/openbabel/openbabel/security/advisories/GHSA-rj4c-r689-cm87 · Note
• https://github.com/openbabel/openbabel/commit/b239d06eb724bb684eea0040e9d87cf07072b081 · Note
• https://github.com/openbabel/openbabel · Note
• https://talosintelligence.com/vulnerability_reports/TALOS-2022-1665 · Note
• https://pypi.org/project/openbabel · Note
• https://github.com/advisories/GHSA-rj4c-r689-cm87 · Note