Null Pointer Dereference in Open Babel's CDXML File Handler
CVE-2026-3408

5.3MEDIUM

Key Information:

Vendor

Open Babel

Status
Open Babel
Vendor
CVE Published:
2 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3408?

A vulnerability exists in Open Babel versions up to 3.1.1, specifically in the CDXML File Handler's function OBAtom::GetExplicitValence, leading to a null pointer dereference. This flaw allows remote attackers to manipulate specific CDXML files, potentially causing a denial of service. The exploit is known and publicly available. Users are strongly recommended to apply the patch identified as e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a to mitigate this issue.

Affected Version(s)

Open Babel 3.1.0

Open Babel 3.1.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-3408 - Proof of Concept

References

https://vuldb.com/?id.348303
vdb-entrytechnical-description
https://vuldb.com/?ctiid.348303
signaturepermissions-required
https://vuldb.com/?submit.763756
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Oneafter (VulDB User)
.