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Medium, CVSS 6.1

pomerium_signature is not verified in middleware in github.com/pomerium/pomerium

CVE-2021-29652GHSA-fv82-r8qv-ch4v

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/pomerium/pomerium 0.13.4), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
6.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
  • CVE-2021-29652: 0.66% estimated exploitation activity in the next 30 days; percentile 51.54 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact Some API endpoints under /.pomerium/ do not verify parameters with pomeriumsignature. This could allow modifying parameters intended to be trusted to Pomerium. The issue mainly affects routes responsible for sign in/out, but does not introduce an authentication bypass. Specific Go Packages Affected github.com/pomerium/pomerium/authenticate Patches Patched in v0.13.4 For more information If you have any questions or comments about this advisory Open an issue in pomerium Email us at security@pomerium.com

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-fv82-r8qv-ch4v

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2021-29652

Advisory: pomerium_signature is not verified in middleware in github.com/pomerium/pomerium
IDs: CVE-2021-29652, GHSA-fv82-r8qv-ch4v
Record: https://patchnext.com/advisories/cve-2021-29652 (revision 1, source checked 26 Oct 2026, 14:59 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/pomerium/pomerium 0.13.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/pomerium/pomerium: affected >= 0.10.0, < 0.13.4; fixed in 0.13.4

## Suggested inspection (read-only)
- Go github.com/pomerium/pomerium: 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/pomerium/pomerium.
- 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://github.com/advisories/GHSA-fv82-r8qv-ch4v (GitHub-reviewed advisory GHSA-fv82-r8qv-ch4v lists affected ranges: Go github.com/pomerium/pomerium >=0.10.0 <0.13.4)

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