TI-2026-83823 Aliases CVE-2026-120431 GHSA-7mxm-h73h-f94f

Heap buffer overflow in Netpbm sgitopnm via crafted SGI files

LOW 38CWE-122Published 2026-11-02 · Updated 2026-11-06

Key facts

Attack vector: Local
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

Summary

Netpbm before 10.86.51, from 11.0 before 11.02.29, and from 11.03 before 11.15.07 contains a heap-based buffer overflow (CWE-122) in the readChannels() function of sgitopnm when it processes RLE-compressed SGI images. When a user processes a crafted SGI file with oversized offset table lengths, an attacker can write controlled data past the heap buffer, causing crashes or potential code execution.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

Netpbm before 10.86.51, 11.x before 11.02.29, and 11.03 before 11.15.07 contains a heap-based buffer overflow in sgitopnm's readChannels() function when processing RLE-compressed SGI images. Attackers can supply crafted SGI files with oversized offset table lengths to write controlled data past the heap buffer, causing crashes or potential code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00149 4th percentileScored 2026-11-07

Fix Fixed Netpbm (Netpbm): 10.86.51, 11.02.29, 11.15.07

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Netpbm	Netpbm	before 10.86.51; 11.0 to before 11.02.29; 11.03 to before 11.15.07	10.86.51, 11.02.29, 11.15.07	Patch available	CNA

Netpbm VendorNetpbm Affected before 10.86.51; 11.0 to before 11.02.29; 11.03 to before 11.15.07 Fixed in 10.86.51, 11.02.29, 11.15.07 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:netpbm_project:netpbm::::::::	—	—	Netpbm Project

cpe:2.3:a:netpbm_project:netpbm:*:*:*:*:*:*:*:* Versions — — ·Netpbm Project

Remediation

Netpbm fixes this in versions 10.86.51, 11.02.29 and 11.15.07.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Fix · CNA Netpbm (Netpbm) Fixed in 10.86.51, 11.02.29, 11.15.07

Timeline

2026-11-02 Threatist record created from CVE-2026-120431
2026-11-02 Alias added: GHSA-7mxm-h73h-f94f
2026-11-04 Priority changed: MEDIUM → LOW
2026-11-06 CISA SSVC decision points changed

References

Patch 1

https://sourceforge.net/p/netpbm/code/5317/

Other 4

TI-2026-76476 Heap out-of-bounds read in Netpbm rasttopnm leaks memory CVSS 4.0MEDIUM 6.9
TI-2003-00141 Multiple vulnerabilities in NetPBM 9.20 and earlier, and possibly other versions, may… CVSS 2.0HIGH 7.5
TI-2005-02810 pnmtopng in netpbm before 10.25, when using the -trans option, uses uninitialized size… CVSS 2.0HIGH 7.5
TI-2009-04054 Stack-based buffer overflow in converter/ppm/xpmtoppm.c in netpbm before 10.47.07 allows… CVSS 2.0HIGH 7.5
TI-2005-02339 pstopnm in netpbm does not properly use the "-dSAFER" option when calling Ghostscript to… CVSS 2.0HIGH 7.5
TI-2026-83828 Heap overflow in Netpbm jbigtopnm can crash the tool or run code CVSS 4.0HIGH 8.5

See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences