CVE-2026-2705
Medium
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.
SeverityMedium
CVSS4.3
Exploit probability—
ProductOpenbabel Open Babel
PublishedFeb 19, 2026
First seenFeb 19, 2026
How to fix
Update
- openbabel3.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openbabel open_babel | v ≤ 3.1.1 | — |
| openbabelPyPI | v < 3.2.0 | 3.2.0 |
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