Medium 4.3Published Feb 19, 2026

CVE-2026-2705Open Babel MOL2 File atom.h SetFormalCharge out-of-bounds

Updated under an hour ago (Oct 27, 2026, 5:50 AM ET)

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It affects openbabel open_babel. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for openbabel open_babel

Exploited in the last 30 days

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.

CVSS: 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Weakness (CWE): CWE-125, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Modified
Record last updated: Mar 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

openbabel open_babel openbabel:open_babel	through 3.1.1	NVD

References

References

https://vuldb.com/?id.346651	vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.346651	signature, permissions-required, vdb-entry
https://vuldb.com/?submit.754379	third-party-advisory, vdb-entry
https://github.com/openbabel/openbabel/issues/2848	issue-tracking, exploit
https://github.com/openbabel/openbabel/pull/2862	issue-tracking, patch
https://github.com/oneafter/0128/blob/main/ob2/repro.mol2	exploit
https://github.com/VedantMadane/openbabel/commit/e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.