CVE-2026-100823
published 2026-09-29CVE-2026-100823: Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 157.
PriorityP423medium5.4CVSS 3.1
AVNACLPRNUIRSUCLINAL
EPSS
0.15%
3.8th percentile
Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 157.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 157 | Firefox 157 |
| mozilla | firefox_mobile | < 157.0 | 157.0 |
CVSS provenance
nvdv3.15.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
vendor_redhat5.4MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
firefox: Spoofing issue in the Downloads component in Firefox for Android
vendor_redhat·2026-09-29·CVSS 5.4
CVE-2026-100823 [MEDIUM] CWE-451 firefox: Spoofing issue in the Downloads component in Firefox for Android
firefox: Spoofing issue in the Downloads component in Firefox for Android
Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 157.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Spoofing issue in the Downloads component in Firefox for Android
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Mitigation: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Package: firefox (Red Hat Enterprise Linux 10) - Not affected
Packa
Mozilla
Mozilla Foundation Security Advisory 2026-97: CVE-2026-100823
vendor_mozilla
CVE-2026-100823 Mozilla Foundation Security Advisory 2026-97: CVE-2026-100823
Mozilla Foundation Security Advisory 2026-97
CVE: CVE-2026-100823
Product: Firefox
Impact: low
Fixed in: Firefox 157
GHSA
Spoofing issue in the Downloads component in Firefox for Android.
ghsa_unreviewed·2026-09-29
CVE-2026-100823 [MEDIUM] Spoofing issue in the Downloads component in Firefox for Android.
Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 157.
No detection rules found.
No public exploits indexed.
2026-09-29
Published