NVD / CVE Program· CNA VulDB

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

Noroxi assessment

Priority: Monitor (action score 8/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.50% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No special conditions are required; it is repeatable.
Fixed version: openbabel (openSUSE:Tumbleweed) 3.2.0-2.1; openbabel (PyPI) 3.2.0.
Severity is disputed: the assigning authority (CNA) scores it 5.3, NVD 2.1.

Low priority for now. Upgrade to openbabel (openSUSE:Tumbleweed) 3.2.0-2.1; openbabel (PyPI) 3.2.0 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

LowCVSS 2.1 · v4.0—No exploit Fix available

Pre-auth

Published: Mar 2, 2026
Updated: Jun 17, 2026
EPSS: 0.5% · 43th percentile
CWE: CWE-404

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 8 / 40 · 2.1 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.5%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · VulDB: 5.3; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
openbabel	open babel	cpe:2.3:a:openbabel:open_babel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

openbabel open babelup to 3.1.1 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulDB). Independent of NVD's CPE analysis and usually ahead of it.

n/a Open Babel
- 3.1.0, 3.1.1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	openbabel	from 0	—
openSUSE:Tumbleweed	openbabel	before 3.2.0-2.1	3.2.0-2.1
PyPI	openbabel	before 3.2.0	3.2.0

Same product

openbabel: all records

Other highest-scoring records for the same primary product.

CVE-2022-46295Multiple out-of-bounds write vulnerabilities exist in the translationVectors parsing functionality in multiple supported formats of Open Bab
31Monitor
CVE-2022-46294Multiple out-of-bounds write vulnerabilities exist in the translationVectors parsing functionality in multiple supported formats of Open Bab
31Monitor
CVE-2022-46293Multiple out-of-bounds write vulnerabilities exist in the translationVectors parsing functionality in multiple supported formats of Open Bab
31Monitor

Published before and after this one in the same product

← EarlierCVE-2025-11000Sep 26, 2025 · Open Babel PQSformat.cpp ReadMolecule null pointer dereference
7Monitor
← EarlierCVE-2026-2704Feb 19, 2026 · Open Babel CIF File transform3d.cpp DescribeAsString out-of-bounds
8Monitor
← EarlierCVE-2026-2705Feb 19, 2026 · Open Babel MOL2 File atom.h SetFormalCharge out-of-bounds
8Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
opensuse:openbabel	3.2.0-2.1 · openSUSE:Tumbleweed	Package registry (OSV)
PyPI:openbabel	3.2.0	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Oneafter (VulDB User)reporter

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2025-10998157 days apartOpen Babel chemkinformat.cpp ReadReactionQualifierLines null pointer dereference
7Monitor
CVE-2025-10999157 days apartOpen Babel cacaoformat.cpp SetHilderbrandt null pointer dereference
7Monitor
CVE-2025-11000157 days apartOpen Babel PQSformat.cpp ReadMolecule null pointer dereference
7Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: P
Scope: X

Weakness class (CWE)

CWE-404 · Improper Resource Shutdown or Release

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Change log

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/VedantMadane/openbabel/commit/e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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