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

Quick assessment

Affected
n/a Open Babel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

openbabel是Open Babel开源的一个化学工具箱软件。 openbabel 3.1.1及之前版本存在代码问题漏洞，该漏洞源于isrc/atom.cpp文件中OBAtom::GetExplicitValence函数存在空指针取消引用，可能导致远程攻击。

CVSS 4.3 · Medium EPSS 0.71% · P52

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-3408

Vulnerability Information
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Vulnerability Title
Open Babel CDXML File atom.cpp GetExplicitValence null pointer dereference
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
openbabel 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
openbabel是Open Babel开源的一个化学工具箱软件。 openbabel 3.1.1及之前版本存在代码问题漏洞，该漏洞源于isrc/atom.cpp文件中OBAtom::GetExplicitValence函数存在空指针取消引用，可能导致远程攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- Open Babel 3.1.0 -

II. Public POCs for CVE-2026-3408

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III. Intelligence Information for CVE-2026-3408

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Patches & Fixes for CVE-2026-3408 (1)

Vendor Advisories for CVE-2026-3408 (1)

Proof of Concept for CVE-2026-3408 (1)

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Showing top 20 of 37 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Open Babel
Same vendor: n/a
Same weakness: CWE-476

V. Comments for CVE-2026-3408

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