Cyber Resilience

CVE-2025-26695

Mozilla Thunderbird ≤ 128.8.0

Published
10 March 2025
Modified
13 April 2026
Patch / advisory
View advisory
CVSS Score v3.1 5.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.0015 5th percentile
Risk Priority 39 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2025-26695 is a medium-severity an unspecified weakness vulnerability in Mozilla Thunderbird. Its CVSS base score is 5.3 (Medium).

Operationally, ranked at the 5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network observer could have learned the length of the requested email address. This vulnerability was fixed in Thunderbird 136 and Thunderbird 128.8.

CWE(s)
NVD-CWE-noinfo

Related Threats

CVEs Like This One

CVE-2025-0510Same product: Mozilla Thunderbird
CVE-2025-3523Same product: Mozilla Thunderbird
CVE-2026-0818Same product: Mozilla Thunderbird
CVE-2025-3522Same product: Mozilla Thunderbird
CVE-2025-26696Same product: Mozilla Thunderbird
CVE-2024-8394Same product: Mozilla Thunderbird
CVE-2023-0616Same product: Mozilla Thunderbird
CVE-2026-14899Same product: Mozilla Thunderbird
CVE-2024-11159Same product: Mozilla Thunderbird
CVE-2025-3909Same product: Mozilla Thunderbird

Affected Assets

mozilla
thunderbird
≤ 128.8.0 · 129.0 — 136.0

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References