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CVE-2020-26955

MEDIUM
6.5
CVSS Score
Published: December 9, 2020 at 12:21 AM UTC
Updated: August 19, 2026 at 03:29 PM UTC
2 products affected across 1 vendorFirefox MobileFirefox

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.8%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox Mobile· Mozilla
95%
v < 83.0
Affected range stops below 83.0, so it looks safe — our inference, not a vendor statement
Firefox· Mozilla
60%
v < 83
Affected range stops below 83, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCIssue TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1663261
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-50/

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-565

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