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Medium, CVSS 5.3

OIDC claims not updated from Identity Provider in Pomerium

CVE-2021-41230GHSA-j6wp-3859-vxfg

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/pomerium/pomerium 0.15.6), 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
5.3 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
  • CVE-2021-41230: 0.86% estimated exploitation activity in the next 30 days; percentile 58.55 (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 Changes to the OIDC claims of a user after initial login are not reflected in policy evaluation when using allowedidpclaims as part of policy. If using allowedidpclaims and a user's claims are changed, Pomerium can make incorrect authorization decisions. Patches v0.15.6 Workarounds - Clear data on databroker service by clearing redis or restarting the in-memory databroker to force claims to be updated References https://github.com/pomerium/pomerium/pull/2724 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-j6wp-3859-vxfg

Agent brief

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# Patch Next advisory brief: CVE-2021-41230

Advisory: OIDC claims not updated from Identity Provider in Pomerium
IDs: CVE-2021-41230, GHSA-j6wp-3859-vxfg
Record: https://patchnext.com/advisories/cve-2021-41230 (revision 1, source checked 26 Oct 2026, 14:55 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
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 0.15.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/pomerium/pomerium: affected >= 0.14.0, < 0.15.6; fixed in 0.15.6

## 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-j6wp-3859-vxfg (GitHub-reviewed advisory GHSA-j6wp-3859-vxfg lists affected ranges: Go github.com/pomerium/pomerium >=0.14.0 <0.15.6)

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