CVE-2026-92240 (GCVE-0-2026-92240)

Vulnerability from cvelistv5 – Published: 2026-09-15 19:42 – Updated: 2026-09-22 15:44
VLAI
Title
Out-of-bounds read in IMAP response parser
Summary
A malicious or compromised IMAP server can trigger an out-of-bounds read in the IMAP response parser by sending an untagged '* ID' response, crashing Thunderbird. The affected parsing path is reachable before authentication. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 15:41 UTC
CWE
Assigner
mozilla CNA under the mitre root
CNA scorecard E 38/100 over 512 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Mozilla Thunderbird Unaffected: 140.16 , ≤ 140.* (rpm)
Unaffected: 153.3 , ≤ 153.* (rpm)
Unaffected: 156 , ≤ * (rpm)
guessed Create a notification for this product.
Credits
Ahmed Albalawi
Show details on NVD website
To clipboard 

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