Medium 4.3Published Mar 1, 2026

CVE-2026-3408Open Babel CDXML File atom.cpp GetExplicitValence null pointer dereference

Updated under an hour ago (Oct 26, 2026, 4:50 PM 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 identified in Open Babel up to 3.1.1. This impacts the function OBAtom::GetExplicitValence of the file isrc/atom.cpp of the component CDXML File Handler. Such manipulation leads to null pointer dereference. The attack can be launched remotely. The exploit is publicly available and might be used. The name of the patch is e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a. It is best practice to apply a patch to resolve this issue.

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-476, CWE-404
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: Analyzed
Record last updated: Mar 2, 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.348303	vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.348303	signature, permissions-required, vdb-entry
https://vuldb.com/?submit.763756	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/ob3/repro.cdxml	exploit, issue-tracking
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.