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TI-2026-74122 Aliases CVE-2026-110628GHSA-8p5c-vr7c-5g49

Unauthenticated server-side request forgery in Kan download route

Priority MEDIUM 46CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

Kan versions 0.5.5 through 0.6.0 contain a server-side request forgery flaw (CWE-918) in the /api/download/attatchment route. The flaw results from an incomplete fix for an earlier issue. When S3_ENDPOINT is unset, the route passes a user-supplied url parameter to fetch(), so an unauthenticated remote attacker can make the server read internal services, localhost ports and cloud instance metadata.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Kan 0.5.5 through 0.6.0 contains an unauthenticated server-side request forgery vulnerability in the /api/download/attatchment route due to an incomplete fix for CVE-2026-32255. When S3_ENDPOINT is unset, attackers can pass arbitrary url query parameters to fetch() to read internal services, localhost ports, and cloud instance metadata.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00425 37th 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
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
kanbnkan0.5.5 – 0.6.0—No fix listedCNA
  • kan Vendorkanbn Affected 0.5.5 – 0.6.0 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Kan.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-110628
  2. 2026-10-14 Alias added: GHSA-8p5c-vr7c-5g49
  3. 2026-10-16 CISA SSVC decision points changed

References

Patch 2

Advisory 2

Other 3

  • TI-2026-62541 kan through 0.6.0 Authorization Bypass via GitHub Project Import CVSS 4.0MEDIUM 5.3

Sources

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