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TI-2026-41665 Aliases CVE-2026-57862GHSA-rj28-q96f-28vw

Kanboard 1.2.52 and prior SSRF Filter Bypass via Hexadecimal IP Notation

Priority HIGH 70CWE-918Published · Updated

Key facts

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

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

Summary

Kanboard 1.2.52 and prior contains a server-side request forgery vulnerability that allows authenticated users to bypass SSRF protections by supplying hexadecimal IP address notation in user-controlled URLs. Attackers can submit hexadecimal-encoded internal IP addresses through the web link creation feature, causing cURL to resolve and connect to internal network resources such as cloud instance metadata services, localhost services, and RFC1918 addresses while the isPrivateURL() filter in app/Core/Http/Client.php incorrectly treats the input as safe due to FILTER_VALIDATE_IP rejecting non-dotted-decimal notation.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00412 35th 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
Poc
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
kanboardKanboardup to 1.2.52—No fix listedCNA
  • Kanboard Vendorkanboard Affected up to 1.2.52 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

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

CPEVersionsRoleVendor
cpe:2.3:a:kanboard:kanboard:*:*:*:*:*:*:*:*——kanboard
  • cpe:2.3:a:kanboard:kanboard:*:*:*:*:*:*:*:* Versions — — ·kanboard

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-57862
  2. 2026-10-03 Alias added: GHSA-rj28-q96f-28vw

References

Other 2

  • TI-2026-17582 Kanboard is Vulnerable to Reverse Proxy Authentication Bypass CVSS 3.1CRITICAL 9.1
  • TI-2025-34713 Kanboard Authenticated Admin Remote Code Execution via Unsafe Deserialization of Events CVSS 3.1CRITICAL 9.1
  • TI-2024-34653 Remote code execution through language setting in kanboard CVSS 3.1CRITICAL 9.1
  • TI-2024-34652 Arbitrary File Read and Delete in kanboard CVSS 3.1CRITICAL 9.1
  • TI-2025-32655 Kanboard Password Reset Poisoning via Host Header Injection CVSS 3.1HIGH 8.8
  • TI-2026-20954 Kanboard is Missing Access Control on Plugin Installation leading to Administrative RCE CVSS 3.1HIGH 8.5
See all 50 →

Sources

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