Is CVE-2026-2705 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-2705 being exploited in the wild.

How severe is CVE-2026-2705?

Medium severity, with a CVSS score of 5.5, published 30 June 2026.

Which products and versions are affected?

openbabel (PyPI) < 3.2.0, ECOSYSTEM:introduced=0,fixed=3.2.0.

Is there a fix for CVE-2026-2705?

Yes. openbabel (PyPI): upgrade to 3.2.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-2705 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-2705?

Check whether you run openbabel (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-2705: Open Babel NULL pointer dereference in MOL2 OBAtom::SetFormalCharge

Q: Which products and versions are affected?

openbabel (PyPI) < 3.2.0, ECOSYSTEM:introduced=0,fixed=3.2.0.

Q: Is there a fix for CVE-2026-2705?

Yes. openbabel (PyPI): upgrade to 3.2.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-2705 attacked?

It is attacked with local access, in a software library.

Q: Am I affected by CVE-2026-2705?

Check whether you run openbabel (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-2705 · Severity: medium · CVSS 5.5 · Published 2026-06-30

Open Babel is a software library used to process and convert chemistry data files. A vulnerability in its file parser allows a specially crafted chemistry file to crash the application. This could lead to a service outage or application failure if a user or automated system attempts to process a malicious file.

Technologies: openbabel (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-2705 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-2705 being exploited in the wild.
How severe is CVE-2026-2705?: Medium severity, with a CVSS score of 5.5, published 30 June 2026.
Which products and versions are affected?: openbabel (PyPI) < 3.2.0, ECOSYSTEM:introduced=0,fixed=3.2.0.
Is there a fix for CVE-2026-2705?: Yes. openbabel (PyPI): upgrade to 3.2.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-2705 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-2705?: Check whether you run openbabel (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

openbabel (PyPI): upgrade to 3.2.0 or later
```
pip install "openbabel>=3.2.0"
```

Technical details

A memory-safety vulnerability exists in Open Babel's MOL2 file format parser due to a NULL pointer dereference in the `OBAtom::SetFormalCharge` function. The flaw is triggered when the parser encounters a malformed atom record in a MOL2 file, causing it to call the method on a NULL atom pointer. An attacker can exploit this by providing a crafted MOL2 file to the `obabel` CLI tool, the `OBConversion` API, or any of its language bindings (Python, Java, etc.). This results in a denial-of-service (application crash). The issue is fixed in version 3.2.0.

Affected products

Open Babel openbabel <= 3.1.1

Identifiers

CVE-2026-2705
GHSA-4w5w-4fhm-q483
PYSEC-2026-2770

Timeline

2026-05-26: patched: Version 3.2.0 released
2026-06-30: advisory: GitHub Advisory published

References

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