medium4.3
CVE-2026-2705
Open Babel has NULL pointer dereference in MOL2 OBAtom::SetFormalCharge
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | openbabel | < 3.2.0 | 3.2.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openbabel | Open Babel | through 3.1.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-4w5w-4fhm-q483
- https://github.com/openbabel/openbabel/security/advisories/GHSA-4w5w-4fhm-q483
- https://nvd.nist.gov/vuln/detail/CVE-2026-2705
- https://github.com/openbabel/openbabel/issues/2848
- https://github.com/openbabel/openbabel/pull/2862
- https://github.com/VedantMadane/openbabel/commit/e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a
- https://github.com/oneafter/0128/blob/main/ob2/repro.mol2
- https://vuldb.com/?ctiid.346651
- https://vuldb.com/?id.346651
- https://vuldb.com/?submit.754379