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TI-2026-69552 Aliases CVE-2026-107449

Server-side request forgery in linuxserver Heimdall test endpoints

Priority MEDIUM 50CWE-918Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

linuxserver Heimdall through 2.8.3 applies its SafeUrlFetcher protection only to ItemController, so application test and live-stats requests use a GuzzleHttp client without IP address restrictions. In some installations, cross-site request forgery reaches POST /test_config and GET /get_stats, letting an unauthenticated attacker make the server send requests to internal hosts and ports and read partial responses (CWE-918). A public exploit is linked in the references.

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

Description from the CNA

linuxserver Heimdall through 2.8.3 applies its SafeUrlFetcher SSRF protection mechanism only to ItemController; the enhanced-application test and live-stats requests occur via SupportedApps::execute(), a GuzzleHttp client that lacks IP address restrictions. In some realistic installations, the POST /test_config (and GET /get_stats) endpoints are accessible through CSRF, and thus an unauthenticated attacker can force the server to send requests to arbitrary internal hosts and ports (including 169.254.169.254) and read a status/port oracle in addition to partial response data.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00162 5th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
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
LinuxServerHeimdallup to 2.8.3—No fix listedCNA
  • Heimdall VendorLinuxServer Affected up to 2.8.3 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Heimdall.

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

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-08 Threatist record created from CVE-2026-107449
  2. 2026-10-08 CISA SSVC decision points changed
  3. 2026-10-08 Priority changed: LOW → MEDIUM

References

Exploit 1

Other 1

  • TI-2025-32167 LinuxServer.io heimdall 2.6.3-ls307 contains a vulnerability in how it handles… CVSS 3.1CRITICAL 9.8
  • TI-2022-23767 Heimdall Application Dashboard through 2.5.4 allows reflected and stored XSS via… CVSS 3.1MEDIUM 5.4
  • TI-2025-34368 LinuxServer.io Heimdall before 2.7.3 allows XSS via the q parameter. CVSS 3.1HIGH 7.2

Sources

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