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Open BabelApplication · Openbabel

CVE-2026-3408

MEDIUM · 6.5 CVSS v3.1 Published 2026-03-02
Fix available
A fix is available. Upgrade to after 3.1.1 or later.
See remediation →
72/100
Remediation priority · Elevated
Public exploit Remotely reachable No privileges Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Open BabelApplication
Affected:<= 3.1.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 3.1.1
Vendor patch github.com →
Recommended fix Moderate confidence
  1. 1. Navigate to the Open Babel source code directory
  2. 2. Fetch the latest changes from the upstream repository or clone the repository: git clone https://github.com/openbabel/openbabel.git
  3. 3. Check out the affected version or the commit directly: git fetch origin and git checkout <version> or git checkout e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a
  4. 4. Apply the patch from commit e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a to src/atom.cpp for the OBAtom::GetExplicitValence function
  5. 5. Rebuild Open Babel from source using standard build commands (typically cmake and make)
  6. 6. Verify the patch was applied correctly by examining the modified code in src/atom.cpp
  7. 7. Test the CDXML File Handler functionality to confirm the null pointer dereference is resolved
  8. 8. Recompile any dependent software that links against Open Babel

Generated from the published advisory — verify against the referenced sources before acting.

We can identify the exact fixed release, upgrade, and verify it in staging — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-3408 in production — separate from our analysis above.

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  • Version or environment caveats, and links to real fixes
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