CVE-2020-26955

6.5 mediumEPSS 0.8%

Medium (6.5) in mozilla firefox mobile. EPSS 0.8% chance of exploitation in the next 30 days.

When a user downloaded a file in Firefox for Android, if a cookie is set, it would have been re-sent during a subsequent file download operation on the same domain, regardless of whether the original and subsequent request were in private and non-private browsing modes. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 83.

Severity

CVSS 3.1

6.5 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-31)
CWE: CWE-565
Published: 2020-12-09
Modified: 2026-08-19
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox_mobile

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1663261
https://www.mozilla.org/security/advisories/mfsa2020-50/
https://bugzilla.mozilla.org/show_bug.cgi?id=1663261
https://www.mozilla.org/security/advisories/mfsa2020-50/

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