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Gameyfin auth bypass in Hilla endpoints exposes game library data

CVE-2026-129131EUVD-2026-125548

6.9MediumCNA
Exploited
No known exploitation
Fix
Fixed in 2.6.2
Who is exposed
Not reported

Do first: Upgrade to a fixed version: 2.6.2.

Published
Last modified
Reference
Last checked
24/100 · provisional
None on Exploit-DB, Metasploit or GitHub

Summary

Gameyfin, the product named in the title, has a missing authorization flaw in its Hilla endpoints that lets an unauthenticated attacker over the network, without logging in, bypass login-required mode and read game catalog metadata, libraries, platforms, plugins and game requests. The attacker does this by posting directly to synchronous endpoint methods such as GameEndpoint.sync, which the security check never covers.

Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.

Read the original description

Gameyfin before 2.6.2 contains a missing authorization vulnerability that allows unauthenticated attackers to bypass login-required mode by calling Hilla endpoints annotated with @AnonymousAllowed. Attackers can POST to synchronous endpoint methods such as GameEndpoint.sync, which LiveSubscriptionSecurity never checks, to retrieve game catalog metadata, libraries, platforms, plugins and game requests.

cve.now Index

24Pcve.now Index 24 of 100 · methodology v3 · provisional
  • Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
  • Exposure17/25No login or user action needed per the CVSS vector, reachable over the network without a login · Unknown: No advisory context yet
  • Reach?/20Unknown. No tracked technology or package matched
  • Severity6.9/10CVSS 6.9
  • No patch0/5No signal

What would change the score

  • Would score about 69 if added to CISA KEV
  • Would score about 64 if CISA's SSVC rates exploitation active
  • Would score about 29 if advisories confirm default setups are exposed

What to do

  • Upgrade to a fixed version: 2.6.2.

Check your systems with an agent

Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.

Check whether my systems are affected by CVE-2026-129131 (Gameyfin before 2.6.2 Missing Authorization in Hilla Endpoints), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-129131 (entry last updated 2026-11-13):
Affected:
- gameyfin gameyfin: fixed in 2.6.2
Fixed versions: 2.6.2.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-129131 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-129131 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/gameyfin/gameyfin/commit/2515f1693c88bfa8145882fd85b790638738032c
- https://github.com/gameyfin/gameyfin/pull/1018
- https://github.com/gameyfin/gameyfin/issues/1017
- https://github.com/gameyfin/gameyfin
- https://github.com/gameyfin/gameyfin/releases/tag/v2.6.2
- https://github.com/gameyfin/gameyfin/blob/1ec9d627228bb77cf2485e259a58d37afa98f2b7/app/src/main/kotlin/org/gameyfin/app/core/security/LiveSubscriptionSecurity.kt#L22
- https://www.vulncheck.com/advisories/gameyfin-before-2.6.2-missing-authorization-in-hilla-endpoints
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-129131
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-129131"}.

Timeline

  1. CVE published
  2. First seen by cve.now

Affected versions

  • gameyfin gameyfin

    fixed in 2.6.2

Evidence 9

CVE record · 2

Establishes: The identifier and description.

  1. Record
  2. Record

Other links · 7

  1. Patch
  2. Patch
  3. Report
  4. Repository
  5. Repository
Show all 7 sourcesShow fewer sources
  1. Repository
  2. Link

Corrections

None so far.

Something wrong on this page? Report an error. Every fix is listed here.

Questions about CVE-2026-129131

Is CVE-2026-129131 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data

Which versions are affected by CVE-2026-129131?

gameyfin: before 2.6.2.Source: cve.now feed data

How do I fix CVE-2026-129131?

Upgrade to a fixed version: 2.6.2.Source: cve.now feed data