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TI-2026-30783 Aliases CVE-2026-42500GHSA-m6fh-wvw4-4629

Panic when reading out of bound palette index in golang.org/x/image/bmp

Priority LOW 30Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

Decoding a paletted BMP file with an out-of-range palette index results in a panic when accessing pixels in the invalid image.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00384 32nd percentileScored 2026-11-07
Fix Partial golang.org/x/image/bmp (golang.org/x/image): 0.41.0Red Hat: 2 advisoriesRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
Go standard librarygolang.org/x/image/bmpbefore 0.41.00.41.0Patch availableCNA
  • golang.org/x/image/bmp VendorGo standard library Affected before 0.41.0 Fixed in 0.41.0 Patch available CNA

Remediation

  • Fix · CNA golang.org/x/image/bmp (golang.org/x/image) Fixed in 0.41.0

Red Hat 2 advisories

  • RHSA-2026:66561 Released 2026-09-11 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images golang1.27-1.27.1-0.1.hum1@aarch64, golang1.27-1.27.1-0.1.hum1@src, golang1.27-1.27.1-0.1.hum1@x86_64 +10
  • RHSA-2026:62391 Released 2026-09-02 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images golang1.26-1.26.8-0.1.hum1@aarch64, golang1.26-1.26.8-0.1.hum1@src, golang1.26-1.26.8-0.1.hum1@x86_64 +10

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesAffectedNo fix planned: Will not fix
Red Hat Hardened ImagesFixed RHSA-2026:62391, RHSA-2026:66561

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42500
  2. 2026-10-03 Alias added: GHSA-m6fh-wvw4-4629

References

Other 4

  • TI-2020-00578 Improper certificate validation in Microsoft Windows KEVCVSS 3.1HIGH 8.1
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-24278 HTTP/2 CONTINUATION flood in net/http CVSS 3.1HIGH 7.5
  • TI-2018-05208 The "go get" implementation in Go 1.9.4, when the -insecure command-line option is used… CVSS 3.1HIGH 8.8
  • TI-2024-16309 Panic when parsing invalid palette-color images in golang.org/x/image CVSS 3.1HIGH 7.5
  • TI-2022-20112 Request smuggling due to improper request handling in golang.org/x/net/http2/h2c CVSS 3.1HIGH 7.5
See all 297 →

Sources

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