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TI-2026-81159 Aliases CVE-2026-117555GHSA-88mq-c93j-j2w3

Heap out-of-bounds read in GreycLab CImg BMP loader

Priority LOW 29CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

CImg through 4.0.6 contains a heap out-of-bounds read in the _load_bmp() function of CImg.h. An integer overflow in the row byte count, classified as CWE-190, lets a crafted BMP file with a large header width wrap the computed row size. An unauthenticated attacker needs a victim to open a crafted BMP file, which can crash the application or disclose heap memory into the decoded image.

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

Description from the CNA

CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. Attackers can supply a crafted BMP file with a large header width that wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00129 2nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
GreycLabCImgup to 4.0.6—No fix listedCNA
  • CImg VendorGreycLab Affected up to 4.0.6 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for CImg.

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

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-117555
  2. 2026-10-27 Alias added: GHSA-88mq-c93j-j2w3
  3. 2026-10-28 Priority changed: MEDIUM → LOW
  4. 2026-10-29 Affected versions changed · Red Hat
  5. 2026-10-29 CVSS score added · Red Hat
  6. 2026-11-02 CISA SSVC decision points changed

References

Patch 1

Other 3

  • TI-2026-35174 CImg Library: Uncontrolled Memory Allocation and Memory Leak in `_load_analyze()` via Crafted NIfTI/Analyze Header CVSS 3.1HIGH 7.5
  • TI-2026-30477 CImg Library: Uncontrolled memory allocation via nb_colors field in _load_bmp CVSS 3.1MEDIUM 5.5
  • TI-2026-30475 CImg Library: Integer overflow in PNM size check bypasses memory guard (_load_pnm) CVSS 3.1MEDIUM 6.1

Sources

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