CVE•Published 2026-06-16•Modified 2026-06-17•0 articles on news•5 live references•NVD data

CVE-2026-53900Mozilla · Firefox_mobile

Vulnerability data via NVD (ingested)

CVSS v3.1

4.3

MEDIUM

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

EPSS percentile

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Weaknesses (CWE)

CWE-345Insufficient Verification of Data Authenticity CWE-384Session Fixation

Description

Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0.

Timeline

Published 2026-06-16

Modified 2026-06-17

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-2026-53900

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-2026-53900