VulnSocial

CVE-2026-9308Disclosure(mozilla / firefox)

LOWCVSS 5.4 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Firefox for iOS Reader View replaced page content in its HTML template before replacing other internal placeholders. A malicious page could include a placeholder string that was later substituted with JSON-LD data, potentially resulting in arbitrary JavaScript execution. This vulnerability was fixed in Firefox for iOS 151.2.

mozilla CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • firefox

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 2 classified signals
  • Peaked 1d ago at 1 mentions (2026-06-01); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
mozilla
Products
firefox

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-06-01: 1Mentions · 2026-06-03: 1Technical Details · 2026-06-01: 106-0106-03
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
Full discourse2 posts
  • DailyCVE@dailycve
    Disclosure

    🟠 #Firefox for #iOS (Reader View), Cross-Site Scripting (XSS), #CVE-2026-9308 (Medium) -DC-Jun2026-164 https://dailycve.com/firefox-for-ios-reader-view-cross-site-scripting-xss-cve-2026-9308-medium-dc-jun2026-164/

    Post summary

    The statement announces CVE-2026-9308, a Medium‑severity XSS flaw in Firefox for iOS Reader View, without any indication of PoC, exploitation, or mitigation.

    0000041
    208 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-9308 Arbitrary JavaScript Execution in Firefox for iOS Reader View via Placeholder Substitution https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-9308

    Post summary

    CVE-2026-9308 is an arbitrary JavaScript execution vulnerability in Firefox for iOS Reader View caused by placeholder substitution.

    0000062
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appmozillafirefox-iphone_os-

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