CVE-2020-26975
MediumCVSS 6.5Exploitation Probability (EPSS)
Elevated risk56th percentile - higher than 56% of all known CVEs
Summary
A malicious app on the user's device could broadcast an Intent to Firefox for Android with arbitrary headers, leading to attacks such as abusing ambient authority or session fixation. This was fixed by only allowing certain safe-listed headers. Affects Firefox < 84.
Risk Assessment
An attacker could exploit this to perform session-based attacks or abuse trust, potentially leading to account takeover or unauthorized actions.
Recommendation
Update Firefox for Android to version 84 or later.
Other vulnerabilities in Firefox for Android
See all- CVE-2023-29534Critical
In Firefox and Focus for Android, techniques were discovered to obscure the fullscreen notification, which could lead to user confusion and spoofing attacks. This affects Firefox for Android and Focus for Android versions prior to 112.
- CVE-2026-100823Medium
Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 157.
- CVE-2026-92033High
Privilege escalation vulnerability in Firefox for Android. Fixed in Firefox 156.
- CVE-2026-84117High
Privilege escalation in Firefox for Android. Fixed in Firefox 155.
- CVE-2026-74975Medium
A spoofing issue exists in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.
- CVE-2026-18809Medium
Information disclosure in Firefox for Android and Firefox Focus for Android. This vulnerability was fixed in Firefox 153.0.3.
- CVE-2026-16397Medium
Clickjacking vulnerability in the WebExtensions component in Firefox for Android. This issue was fixed in Firefox 153.
- CVE-2026-16373High
Vulnerability in the Privacy component in Firefox for Android. The flaw leads to information disclosure. The issue was fixed in Firefox 153.
- CVE-2025-8041Medium
In Firefox for Android, the address bar truncated the display of URLs from the end instead of prioritizing the origin. This vulnerability was fixed in Firefox 141.
- CVE-2025-6431Medium
When a link can be opened in an external application, Firefox for Android will, by default, prompt the user before doing so. An attacker could have bypassed this prompt, potentially exposing the user to security vulnerabilities or privacy leaks in external applications. This bug only affects Firefox for Android. Other versions of Firefox are unaffected. This vulnerability was fixed in Firefox 140.
Original NVD description (English source)
When a malicious application installed on the user's device broadcast an Intent to Firefox for Android, arbitrary headers could have been specified, leading to attacks such as abusing ambient authority or session fixation. This was resolved by only allowing certain safe-listed headers. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 84.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS