CVE•Published 2020-12-09•Modified 2026-08-19•0 articles on news•5 live references•NVD data

CVE-2020-26955Mozilla · Firefox_mobile

Vulnerability data via NVD (ingested)

CVSS v3.1

6.5

MEDIUM

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

EPSS percentile

Exploit Prediction Scoring System · top 46% of all CVEs

Weaknesses (CWE)

CWE-565Reliance on Cookies without Validation and Integrity Checking

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.

Timeline

Published 2020-12-09

Modified 2026-08-19

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2020-26955

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Mozilla Firefox Mobile"

All exposed Mozilla Firefox Mobile instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Firefox Mobile"

HTTP body or banner mentions "Firefox Mobile" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2020-26955