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Wildcard registry selection in Contrast imagepuller leaks credentials

Priority LOW 10CWE-1289Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

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

Summary

Edgeless Systems Contrast from 1.21.0 before 1.25.0 contains a non-deterministic registry selection flaw in imagepuller that can prefer wildcard configuration entries over concrete domain matches. When a pull configuration lists both a concrete domain and its parent wildcard, registry credentials, CA bundles, or mirror settings meant for the wildcard may be applied to the concrete registry. An attacker with low privileges and adjacent network access may leak credentials or pull metadata. The weakness is classified as CWE-1289 (Improper Validation of Unsafe Equivalence in Input).

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Edgeless Systems Contrast from 1.21.0 before 1.25.0 contains a non-deterministic registry selection flaw in imagepuller that can prefer wildcard configuration entries over concrete domain matches. When a pull configuration lists both a concrete domain and its parent wildcard, registry credentials, CA bundles, or mirror settings intended for the wildcard may be applied to the concrete registry, leaking credentials or pull metadata.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00159 5th percentileScored 2026-11-07
Fix Fixed contrast (edgelesssys): 1.25.0

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
edgelesssyscontrast1.21.0 to before 1.25.01.25.0Patch availableCNA
  • contrast Vendoredgelesssys Affected 1.21.0 to before 1.25.0 Fixed in 1.25.0 Patch available CNA

Remediation

Upgrade Edgeless Systems Contrast to version 1.25.0 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA contrast (edgelesssys) Fixed in 1.25.0

Timeline

  1. 2026-10-25 Threatist record created from CVE-2026-116197
  2. 2026-10-27 Alias added: GHSA-xx94-cp2x-w69r
  3. 2026-10-29 CISA SSVC decision points changed

References

  • TI-2026-64974 Edgeless Systems Contrast through 1.20.0 Denial of Service via ciphertextContainer CVSS 4.0MEDIUM 5.3
  • TI-2026-64973 Contrast before 1.16.0 Remote Attestation Relay Attack CVSS 4.0CRITICAL 9.1
  • TI-2026-64976 Contrast before 1.19.1 CopyFile Policy Symlink Subversion CVSS 4.0HIGH 8.6
  • TI-2026-64971 Contrast before 1.23.1 Image Substitution via Policy Generation CVSS 4.0HIGH 8.6
  • TI-2026-71174 Contrast world-writable containerd config allows privilege escalation CVSS 4.0HIGH 8.5
  • TI-2025-43536 Contrast before 1.8.1 Information Disclosure via Logging CVSS 4.0HIGH 8.5
See all 14 →

Sources