GHSA-4w5w-4fhm-q483

Suggest an improvement
Source
https://github.com/advisories/GHSA-4w5w-4fhm-q483
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-4w5w-4fhm-q483/GHSA-4w5w-4fhm-q483.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-4w5w-4fhm-q483
Aliases
Published
2026-06-30T18:47:00Z
Modified
2026-07-13T16:43:30Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • 2.1 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
Open Babel has NULL pointer dereference in MOL2 OBAtom::SetFormalCharge
Details

Summary

A memory-safety vulnerability in Open Babel's MOL2 file format parser caused a NULL pointer dereference when reading a crafted input file.

Details

The flaw was in OBAtom::SetFormalCharge as called from the MOL2 parser. A malformed atom record caused the parser to call the method on a NULL atom 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 MOL2 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/e23a224b Tracked in #2862.

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 Vedant Madane (@VedantMadane) via VulDB.

Database specific 
{
    "cwe_ids":  [
        "CWE-119",
        "CWE-476"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-06-30T18:47:00Z",
    "nvd_published_at":  null,
    "severity":  "LOW"
}
References

Affected packages

PyPI / openbabel

Package

Name
openbabel
View open source insights on deps.dev
Purl
pkg:pypi/openbabel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.2.0

Affected versions

1.*
1.8
1.8.1
1.8.2
1.8.3
1.8.4
2.*
2.4.0
2.4.1
3.*
3.0.0a1
3.0.0
3.1.1
3.1.1.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-4w5w-4fhm-q483/GHSA-4w5w-4fhm-q483.json"