PT-2026-55140 · Pypi · Open Babel
Published
2026-07-01
·
Updated
2026-07-01
CVSS v3.1
4.4
Medium
| Vector | AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L |
Summary
A memory-safety vulnerability in Open Babel's PQS parser caused an
out-of-bounds (pre-buffer) read when reading a crafted input file.
Details
The flaw was in the
lowerit helper used by the PQS parser. A
malformed input caused the helper to read one or more bytes before
the start of its input 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 PQS 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/f4a5ebae
Fixes consolidated in #2913.
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 via OSS-Fuzz.
Exploit
Fix
Improper Resource Release
Out of bounds Read
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Related Identifiers
Affected Products
Open Babel