CVE-2026-3408: A vulnerability was identified in Open Babel up to 3.1.1

Q: How do I fix CVE-2026-3408?

open babel: upgrade to newer than 3.1.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-3408 being exploited?

CVE-2026-3408 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-3408 affect?

CVE-2026-3408 affects open babel. Severity is medium (CVSS 4.3). 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 ca

Q: How urgent is CVE-2026-3408?

Priority 31/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2026-3408 is a medium-severity flaw (CVSS 4.3) affecting open babel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-404, CWE-476, CWE-787
Published	2026-03-02
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: openbabel

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-02 04:16 UTCPublished CVE record published
2026-06-17 10:43 UTCUpdated Record last modified

openbabel open babel UPGRADE

Affected: <= 3.1.1

Fixed in: newer than 3.1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy open-babel || rpm -q open-babel || open-babel --version

2. UPGRADE to newer than 3.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade open-babel

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade open-babel

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-3408?

open babel: upgrade to newer than 3.1.1. Exact commands for each OS are on this page.

Is CVE-2026-3408 being exploited?

CVE-2026-3408 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-3408 affect?

CVE-2026-3408 affects open babel. Severity is medium (CVSS 4.3). 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 ca

How urgent is CVE-2026-3408?

Priority 31/100. Public exploit reference

Related CVEs

CVE-2025-10996 MEDIUM 5.3 UPGRADE A vulnerability was detected in Open Babel up to 3.1.1
CVE-2025-10997 MEDIUM 5.3 UPGRADE A flaw has been found in Open Babel up to 3.1.1
CVE-2025-10994 MEDIUM 5.3 UPGRADE A weakness has been identified in Open Babel up to 3.1.1
CVE-2025-10995 MEDIUM 5.3 UPGRADE A security vulnerability has been detected in Open Babel up to 3.1.1
CVE-2025-10999 LOW 3.3 UPGRADE A vulnerability was found in Open Babel up to 3.1.1

References

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