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CVE-2026-118175EUVD-2026-111352GHSA-WC7R-3C8H-4JRF

Content of other messages could be included when replying to a crafted message

Published
Last modified
published
Not listed in CISA KEV
None on Exploit-DB, Metasploit or GitHub

Summary

Mozilla Thunderbird, the email client, is affected. A specially crafted email can cause content from a different message in the same folder to be silently included when the user replies to, forwards, or edits it, and if the user sends that message, the other message's content is exposed to the recipients.

Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.

Read the original description

When replying to, forwarding, or editing a crafted email message as new, Thunderbird could embed parts of a different message stored in the same folder into the message being composed, without showing a blocked content warning. If the user sent the message, the content of the other message was disclosed to the recipients. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.

Timeline

  1. CVE published
  2. First seen by cve.now
  3. Record last updated

Affected versions

  • Mozilla Thunderbird

    Version range not reported

References 3

bugzilla.mozilla.org

mozilla.org