PT-2026-55135 · Pypi · Open Babel
Published
2026-07-01
·
Updated
2026-07-01
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
Summary
A memory-safety vulnerability in Open Babel's ChemKin parser caused
a NULL pointer dereference when reading a crafted input file.
Details
The flaw was in
ChemKinFormat::ReadReactionQualifierLines. A
malformed reaction qualifier record caused the parser to dereference
a NULL pointer.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 ChemKin 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/af4a4212
Originally reported as #2829; 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
NULL Pointer Dereference
Improper Resource Release
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Related Identifiers
Affected Products
Open Babel