What is CVE-2020-26955?

CVE-2020-26955 is a vulnerability in Firefox for Android that allows a re-sending of cookies during subsequent file download operations on the same domain, regardless of browsing mode.

How does CVE-2020-26955 affect Firefox for Android?

CVE-2020-26955 affects Firefox for Android by allowing cookies to be re-sent during subsequent file downloads on the same domain.

What is the severity of CVE-2020-26955?

The severity of CVE-2020-26955 is medium with a CVSS score of 6.5.

How can I fix the CVE-2020-26955 vulnerability in Firefox for Android?

To fix the CVE-2020-26955 vulnerability in Firefox for Android, update to version 83 or higher.

Where can I find more information about CVE-2020-26955?

For more information about CVE-2020-26955, you can refer to the following references: [Bugzilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1663261), [Mozilla Security Advisories](https://www.mozilla.org/en-US/security/advisories/mfsa2020-50/)

Vulnerability/
CVE-2020-26955

medium

6.5

CWE

565

17/11/2020

9/12/2020

4/8/2024

CVE-2020-26955

First published: Tue Nov 17 2020(Updated: )

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.

Credit: security@mozilla.org

Affected Software	Affected Version	How to fix
Mozilla Firefox	<83	83
	<83	83
Mozilla Firefox	<83.0

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

MFSA2020-50

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

What is CVE-2020-26955?
CVE-2020-26955 is a vulnerability in Firefox for Android that allows a re-sending of cookies during subsequent file download operations on the same domain, regardless of browsing mode.
How does CVE-2020-26955 affect Firefox for Android?
CVE-2020-26955 affects Firefox for Android by allowing cookies to be re-sent during subsequent file downloads on the same domain.
What is the severity of CVE-2020-26955?
The severity of CVE-2020-26955 is medium with a CVSS score of 6.5.
How can I fix the CVE-2020-26955 vulnerability in Firefox for Android?
To fix the CVE-2020-26955 vulnerability in Firefox for Android, update to version 83 or higher.
Where can I find more information about CVE-2020-26955?
For more information about CVE-2020-26955, you can refer to the following references: [Bugzilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1663261), [Mozilla Security Advisories](https://www.mozilla.org/en-US/security/advisories/mfsa2020-50/)

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