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5.3

Open Babel 3.1.1: Out-of-bounds read in MOL2 File Handler

CVE-2026-2705
Summary

A security issue was found in Open Babel's MOL2 File Handler. This could allow an attacker to access sensitive data. Open Babel's developers have released a patch to fix this issue, which you should apply to your version to stay secure.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software
VendorProductAffected versionsFix available
openbabel open_babel <= 3.1.1 –
Original title
A vulnerability was detected in Open Babel up to 3.1.1. The impacted element is the function OBAtom::SetFormalCharge in the library include/openbabel/atom.h of the component MOL2 File Handler. The ...
Original description
A vulnerability was detected in Open Babel up to 3.1.1. The impacted element is the function OBAtom::SetFormalCharge in the library include/openbabel/atom.h of the component MOL2 File Handler. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit is now public and may be used. The patch is identified as e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a. A patch should be applied to remediate this issue. The project was informed of the problem early through an issue report but has not responded yet.
nvd CVSS2.0 5.0
nvd CVSS3.1 8.1
nvd CVSS4.0 5.3
Vulnerability type
CWE-119 Buffer Overflow
CWE-125 Out-of-bounds Read
Published: 19 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026