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Missing authentication in OSSRS srs System API

Priority HIGH 70CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

OSSRS srs up to 7.0-a1 is affected. The systemAPI.Run function in internal/proxy/api.go of the System API component lacks authentication (CWE-306). A remote attacker without privileges or user interaction can reach the function, and 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

A vulnerability was detected in OSSRS srs up to 7.0-a1. This affects the function systemAPI.Run of the file internal/proxy/api.go of the component System API. Performing a manipulation results in missing authentication. It is possible to initiate the attack remotely. The exploit is now public and may be used. Upgrading to version 8.0-d0 mitigates this issue. The patch is named bb5fde228f4ca5bd26d96368b61f6e0c21df51df. The affected component should be upgraded.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00495 42nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed srs (OSSRS): 8.0-d0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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
ossrssrs7.0-a18.0-d0Patch availableCNA
  • srs Vendorossrs Affected 7.0-a1 Fixed in 8.0-d0 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:ossrs:srs:*:*:*:*:*:*:*:*——ossrs
  • cpe:2.3:a:ossrs:srs:*:*:*:*:*:*:*:* Versions — — ·ossrs

Remediation

Upgrade OSSRS srs to version 8.0-d0, which contains patch bb5fde228f4ca5bd26d96368b61f6e0c21df51df.

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

  • Fix · CNA srs (OSSRS) Fixed in 8.0-d0

Timeline

  1. 2026-10-06 Threatist record created from CVE-2026-105486
  2. 2026-10-06 Alias added: GHSA-m55h-2fw5-fv4g
  3. 2026-10-06 CISA SSVC decision points changed
  4. 2026-10-06 Priority changed: MEDIUM → HIGH

References

  • TI-2023-16951 SRS has command injection vulnerability in demonstration api-server for HTTP callback. CVSS 3.1HIGH 7.5
  • TI-2024-19651 SRS DOM - XSS on JSONP callback CVSS 3.1HIGH 7.2

Sources