VDB-346651 · Submit #754379 · CVE-2026-2705

Open Babel up to 3.1.1 MOL2 File include/openbabel/atom.h OBAtom::SetFormalCharge out-of-bounds

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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in Open Babel up to 3.1.1. This affects the function OBAtom::SetFormalCharge in the library include/openbabel/atom.h of the component MOL2 File Handler. This manipulation causes out-of-bounds. This vulnerability is handled as CVE-2026-2705. The attack can be initiated remotely. Additionally, an exploit exists. To fix this issue, it is recommended to deploy a patch. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability was found in Open Babel up to 3.1.1. It has been declared as problematic. Affected by this vulnerability is the function OBAtom::SetFormalCharge in the library include/openbabel/atom.h of the component MOL2 File Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-2705. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet. The vulnerability scanner Nessus provides a plugin with the ID 299601 (Linux Distros Unpatched Vulnerability : CVE-2026-2705), 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 vulnerability database at Tenable (299601). Statistical analysis made it clear that VulDB provides the best quality 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: 5.6
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 8.1
NVD Vector: 🔒

CNA Base Score: 4.3
CNA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
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: 299601
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-2705

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a

Timelineinfo

02/18/2026 Advisory disclosed
02/18/2026 +0 days VulDB entry created
03/01/2026 +11 days VulDB entry last update

Sourcesinfo

Advisory: 2848
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-2705 (🔒)
GCVE (CVE): GCVE-0-2026-2705
GCVE (VulDB): GCVE-100-346651
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/18/2026 19:10
Updated: 03/01/2026 09:47
Changes: 02/18/2026 19:10 (57), 02/19/2026 22:08 (2), 02/21/2026 20:39 (40), 03/01/2026 08:12 (9), 03/01/2026 09:47 (1)
Complete: 🔍
Submitter: Oneafter
Cache ID: 216::103

Submitinfo

Accepted

Submit #754379: openbabel master-branch NULL Pointer Dereference (by Oneafter)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.