What is GHSA-6xv8-mg86-mq56?

GHSA-6xv8-mg86-mq56 is a security advisory published by GitHub Security Advisories with Medium severity. Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP...

Which CVE IDs does GHSA-6xv8-mg86-mq56 cover?

GHSA-6xv8-mg86-mq56 covers the following CVE IDs: CVE-2026-53900. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-6xv8-mg86-mq56?

GHSA-6xv8-mg86-mq56 has a CVSS v3 base score of 4.3, published by GitHub Security Advisories.

GHSA-6xv8-mg86-mq56MediumCVSS 4.3

Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP...

Vendor

GitHub Security Advisories

Published

June 16, 2026

Last Modified

June 16, 2026

🔗 CVE IDs covered (1)

CVE-2026-53900 →

📋 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.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-53900
https://bugzilla.mozilla.org/show_bug.cgi?id=2043204
https://www.mozilla.org/security/advisories/mfsa2026-56
https://github.com/advisories/GHSA-6xv8-mg86-mq56