CVE-2026-74975: Spoofing issue in the Downloads component in Firefox for Android

Q: How do I fix CVE-2026-74975?

firefox mobile: upgrade to 154.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-74975 being exploited?

CVE-2026-74975 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-74975 affect?

CVE-2026-74975 affects firefox mobile. Severity is medium (CVSS 5.4). Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.

Q: How urgent is CVE-2026-74975?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2026-74975 is a medium-severity flaw (CVSS 5.4) affecting firefox mobile. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-451
Published	2026-08-18
Last modified	2026-10-22

Publisher (CNA): Mozilla Corporation · Vendor: mozilla

Am I affected?

Timeline

2026-08-18Published CVE record published
2026-10-22 22:10 UTCUpdated Record last modified

mozilla firefox mobile UPGRADE

Affected: < 154.0

Fixed in: 154.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy firefox-mobile || rpm -q firefox-mobile || firefox-mobile --version

2. UPGRADE to 154.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade firefox-mobile

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade firefox-mobile

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-74975?

firefox mobile: upgrade to 154.0. Exact commands for each OS are on this page.

Is CVE-2026-74975 being exploited?

CVE-2026-74975 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-74975 affect?

CVE-2026-74975 affects firefox mobile. Severity is medium (CVSS 5.4). Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.

How urgent is CVE-2026-74975?

Priority 23/100. No elevated risk signals yet.

Software pages

Android vulnerabilities · Mozilla Firefox vulnerabilities

Related CVEs

CVE-2023-29550 HIGH 8.8 UPGRADE UPGRADE Memory safety bugs present in Firefox 111 and Firefox ESR 102.9
CVE-2023-29535 MEDIUM 6.5 UPGRADE UPGRADE Following a Garbage Collector compaction, weak maps may have been accessed before they were correctly traced
CVE-2023-29548 MEDIUM 6.5 UPGRADE UPGRADE A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization result
CVE-2023-29536 HIGH 8.8 UPGRADE UPGRADE An attacker could cause the memory manager to incorrectly free a pointer that addresses attacker-controlled me
CVE-2023-29539 HIGH 8.8 UPGRADE UPGRADE When handling the filename directive in the Content-Disposition header, the filename would be truncated if the

References

← Back to latest CVEs