GHSA-55f6-pf8r-c2f4

Source

https://github.com/advisories/GHSA-55f6-pf8r-c2f4

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-55f6-pf8r-c2f4/GHSA-55f6-pf8r-c2f4.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-55f6-pf8r-c2f4

Aliases

Published

2026-07-06T16:41:43Z

Modified

2026-07-20T05:15:25Z

Severity

7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator

Summary

Open Babel has out-of-bounds write in MOPAC translationVectors[] (UNIT CELL TRANSLATION)

Details

Summary

A memory-safety vulnerability in Open Babel's MOPAC output parser allowed an out-of-bounds write into the translationVectors[] array when reading the "UNIT CELL TRANSLATION" block of a crafted input file.

Details

The MOPAC output reader stored translation vectors from the UNIT CELL TRANSLATION block into a fixed-size translationVectors[] array. A malformed block could push more vectors than the array had slots, causing a write past the end of the array. One of five translationVectors[] OOB writes in the TALOS 2022 batch.

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 MOPAC output 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/40e85213

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.

Database specific

{
    "cwe_ids": [
        "CWE-119",
        "CWE-787"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-06T16:41:43Z",
    "nvd_published_at": null,
    "severity": "HIGH"
}

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/2026/07/GHSA-55f6-pf8r-c2f4/GHSA-55f6-pf8r-c2f4.json"