Anubis: Policy bypass via client controlled X-Original-URI header

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

EPSS

• CVE-2026-62314: 0.34% estimated exploitation activity in the next 30 days; percentile 27.49 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Any HTTP client can bypass Anubis bot protection on the default configuration by adding a single request header. No challenge needs to be solved. Affected versions: v1.22.0 through v1.25.0 (introduced in commit d1d631a, PR #1015) The root cause is in lib/policy/checker.go, PathChecker.Check(): The header value comes directly from the client request. The middleware chain never strips it. In reverse proxy mode an attacker fully controls it. The default policy imports data/common/keep-internet-working.yaml, which contains path-only ALLOW rules with no other conditions: When X-Original-URI matches one of those regexes, the rule fires as ALLOW and the request is forwarded upstream without any challenge or JWT check. Proof of concept Normal request, gets challenged: Bypass, gets upstream content: The first command returns the Anubis challenge page title. The second returns the real site title directly, with no cookie set and no challenge issued. Verified live against anubis.techaro.lol.…

Published by the source

2 Oct 2026, 18:22 UTC

Last modified by the source

7 Oct 2026, 17:45 UTC

Source last checked

26 Oct 2026, 15:29 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-6wcg-mqvh-fcvg

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GO-2026-6639

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-6wcg-mqvh-fcvg

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# Patch Next advisory brief: CVE-2026-62314

Advisory: Anubis: Policy bypass via client controlled X-Original-URI header
IDs: CVE-2026-62314, GHSA-6wcg-mqvh-fcvg
Record: https://patchnext.com/advisories/cve-2026-62314 (revision 3, source checked 26 Oct 2026, 15:29 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/TecharoHQ/anubis 1.26.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/TecharoHQ/anubis: affected >= 1.22.0, < 1.26.0; fixed in 1.26.0

## Suggested inspection (read-only)
- Go github.com/TecharoHQ/anubis: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/TecharoHQ/anubis.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GO-2026-6639 (OSV record GO-2026-6639 lists affected ranges: Go github.com/TecharoHQ/anubis >=1.22.0 <1.26.0 (fixed))
- Verified: https://osv.dev/vulnerability/GHSA-6wcg-mqvh-fcvg (OSV record GHSA-6wcg-mqvh-fcvg lists affected ranges: Go github.com/TecharoHQ/anubis >=1.22.0 <1.26.0 (fixed))
- Verified: https://github.com/advisories/GHSA-6wcg-mqvh-fcvg (GitHub-reviewed advisory GHSA-6wcg-mqvh-fcvg lists affected ranges: Go github.com/TecharoHQ/anubis >=1.22.0 <1.26.0)

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