Open Babel has heap buffer overflow in SMILES OBSmilesParser::ParseSmiles
Summary
A memory-safety vulnerability in Open Babel's SMILES parser caused a heap buffer overflow when reading a crafted input string.
Details
The flaw was in OBSmilesParser::ParseSmiles. A malformed SMILES
input caused the parser to write past the end of a heap-allocated
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 parse a malicious SMILES string with the
obabel tool, the OBConversion API, or any of the language
bindings (Python, Ruby, Java, R, Perl, C#, PHP). SMILES strings are
commonly passed on the command line and through scripted pipelines,
so this primitive is especially reachable.
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/b34cd604 Originally reported as #2831; 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.
Software afectado
Haz clic en una tecnología para ver todas sus vulnerabilidades.
| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | openbabel | < 3.2.0 | 3.2.0 |
Referencias
- https://github.com/openbabel/openbabel/security/advisories/GHSA-j35x-w4gj-pf7w
- https://nvd.nist.gov/vuln/detail/CVE-2025-10996
- https://github.com/openbabel/openbabel/issues/2831
- https://github.com/openbabel/openbabel/pull/2913
- https://github.com/openbabel/openbabel/commit/b34cd604
- https://github.com/openbabel/openbabel
- https://github.com/user-attachments/files/22318556/poc.zip
- https://vuldb.com/?ctiid.325924
- https://vuldb.com/?id.325924
- https://vuldb.com/?submit.654060
- https://pypi.org/project/openbabel
- https://github.com/advisories/GHSA-j35x-w4gj-pf7w
- Vector CVSS
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Debilidad (CWE)
CWE-119- Plataforma
- Python (PyPI)
- Paquete
openbabel- Publicada
- 30.06.2026
- Actualizado
- 11.10.2026 14:18
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-2781 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-j35x-w4gj-pf7w - CC BY 4.0
Historial de vulnerabilidades: openbabel
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 24
- Primera → última
- 06.2026 07.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 16
- Media 2
- Baja 6
Divulgaciones por año
- 2026: 24
-
Open Babel has heap buffer overflow in SMILES OBSmilesParser::ParseSmiles esta entrada
Identifica las vulnerabilidades de tu aplicación
Con la integración de DockRay y el inventario de software activado, DockRay compara las versiones notificadas de los componentes con las vulnerabilidades conocidas y avisa de las coincidencias confirmadas. La cobertura depende de la tecnología compatible y de los avisos disponibles.