What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-19 · updated 2026-06-17
• Weakness: CWE-119

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.

Affected products

• Open Babel: through 3.1.1

References

• https://github.com/VedantMadane/openbabel/commit/e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a
• https://github.com/oneafter/0128/blob/main/ob2/repro.mol2
• https://github.com/openbabel/openbabel/issues/2848
• https://github.com/openbabel/openbabel/pull/2862
• https://vuldb.com/?ctiid.346651
• https://vuldb.com/?id.346651
• https://vuldb.com/?submit.754379

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