Stack Out-of-Bounds Read in CGNS ADFI_read_node_header
CVE-2026-110661

4.8MEDIUM

Key Information:

Vendor

Cgns

Status
Cgns
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-110661?

CGNS versions up to 4.5.2 are susceptible to a stack out-of-bounds read vulnerability within the ADFI_read_node_header function. This flaw allows attackers to produce specially crafted .cgns or .adf files with non-NUL-terminated end tags, which can result in the ADFI_stridx_c function reading beyond the intended memory bounds. Such an exploit has the potential to crash applications that utilize these files, including tools like cgnslist, causing disruption in workflow and system operations.

Affected Version(s)

CGNS 0 <= 4.5.2

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-2026-110661 - Proof of Concept

References

https://hackmd.io/@haind-pwn/cgns-adf-node-header-oob-read
technical-descriptionexploit
https://github.com/CGNS/CGNS/blob/3a972d92559787a49c5f9a5...
technical-description
https://github.com/CGNS/CGNS
product

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
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

HaiND from the Post and Telecommunication Institute of Technology
.