Open Babel up to 3.1.1 CDXML File isrc/atom.cpp GetExplicitValence null pointer dereference

HistoryDiffrelatejsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.9	$0-$5k	1.11

Summaryinfo

A vulnerability marked as problematic has been reported in Open Babel up to 3.1.1. Affected is the function OBAtom::GetExplicitValence of the file isrc/atom.cpp of the component CDXML File Handler. Performing a manipulation results in null pointer dereference. This vulnerability was named CVE-2026-3408. The attack may be initiated remotely. In addition, an exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Open Babel up to 3.1.1. This affects the function OBAtom::GetExplicitValence of the file isrc/atom.cpp of the component CDXML File Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-3408. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 300632 (Linux Distros Unpatched Vulnerability : CVE-2026-3408), which helps to determine the existence of the flaw in a target environment.

Applying the patch e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (300632) and EUVD (EUVD-2026-9141). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Open Babel

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔒

CNA Base Score: 4.3
CNA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 300632
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-3408

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a

Timelineinfo

03/01/2026 Advisory disclosed
03/01/2026 +0 days VulDB entry created
03/05/2026 +4 days VulDB entry last update

Sourcesinfo

Advisory: 2848
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-3408 (🔒)
GCVE (CVE): GCVE-0-2026-3408
GCVE (VulDB): GCVE-100-348303
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/01/2026 08:16
Updated: 03/05/2026 11:07
Changes: 03/01/2026 08:16 (60), 03/02/2026 05:37 (30), 03/02/2026 11:01 (1), 03/03/2026 15:23 (1), 03/04/2026 07:36 (11), 03/05/2026 11:07 (2)
Complete: 🔍
Submitter: Oneafter
Cache ID: 216:823:103

Submitinfo

Accepted

Submit #763756: openbabel Open Babel 3.1.1 and master-branch NULL Pointer Dereference (by Oneafter)