Information Disclosure in Firefox's Graphics: Text Component
CVE-2026-74945

6.5MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
18 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-74945?

A vulnerability within the Graphics: Text component of Firefox allows for unintended information disclosure. This issue could potentially expose sensitive data that should remain protected. Mozilla has addressed this vulnerability in various versions, ensuring enhanced security and privacy for users. Affected versions, including Firefox 154 and multiple iterations of Firefox ESR, have been updated to mitigate this risk effectively.

Affected Version(s)

Firefox 115.39

Firefox 140.14

Firefox 153.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

Palimpsest
Created by defineid

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2057808
https://www.mozilla.org/security/advisories/mfsa2026-74/
https://www.mozilla.org/security/advisories/mfsa2026-75/

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Abdulaziz Alasaiqah
.