What is the CVSS score of CVE-2026-3408?

CVE-2026-3408 has a CVSS 4.0 base score of 2.1 (Low). 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. EPSS exploitation probability: 0.1%.

Is there a public PoC exploit available for CVE-2026-3408?

Yes, a public proof-of-concept exploit is available for CVE-2026-3408. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3408?

Within 30 days: Identify affected systems running Open Babel and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Open Babel CVE-2026-3408

EUVD-2026-9141 LOW

Improper Resource Shutdown or Release (CWE-404)

2026-03-02 cna@vuldb.com

GHSA-fg6r-xgp8-x64r

GHSA-rxpr-wq63-jr7p

Denial Of Service Open Babel Babel Openbabel

2.1

CVSS 4.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-404 OWASP Top 10:2025 A05:2021 - Security Misconfiguration ASVS 5.0 V15 - Secure Coding and Architecture Resource release
Impact	CVSS 4.3 (MEDIUM). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: Required. Exploitable via remote/network. Public exploit/POC available.
Exploit ScenarioDerived	A remote attacker could exploit this flaw, null pointer dereference.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Open Babel versions up to 3.1.1 contain a null pointer dereference in the CDXML file handler's OBAtom::GetExplicitValence function, allowing remote attackers to crash the application through maliciously crafted files. Public exploit code exists for this vulnerability, making it a practical attack vector for denial of service. A patch is available and should be applied to all affected installations.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 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. [CVSS 4.3 MEDIUM]

RemediationAI

A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.

Affected VersionsENISA

Open Babel 3.1.0

Open Babel 3.1.1

Affected Packages

pypi openbabel fix: 3.2.0

euvd open_babel no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in pypi, euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-404 (Improper Resource Shutdown or Release). Affects Open Babel. 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.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 2.1 LOW

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

SUSE 4.3 MEDIUM

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

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

Passive

Vulnerable system: Confidentiality

None

Vulnerable system: Integrity

None

Vulnerable system: Availability

Low

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

4.3 (MEDIUM) 2.1 (LOW)

PoC Detected

Mar 04, 2026 - 02:40 vuln.today

Public exploit code

Patch released

Mar 04, 2026 - 02:40 nvd

Patch available

CVE Published

Mar 02, 2026 - 04:16 nvd

MEDIUM 4.3

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

Organizations using Open Babel should be aware of moderate risk from CVE-2026-3408 rated CVSS 4.3. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available. A patch is available and should be applied during regular vulnerability management.

Business Impact: Low

Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score

0.1%

Top 80% exploitable

Threat Intel

1 source

Exploit

POC

Public exploit code exists

Data Quality

6 sources

Confidence: High

EUVD

NVD

CVE.org

EPSS GHSA Vendor

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity LOW

CISA KEV No

Public POC Yes

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

LOW severity (CVSS 0.1-3.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.