SecuriTricks - CVE-2026-12313

Description

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.

Product(s) Impacted

Vendor	Product	Versions
Mozilla	Firefox Firefox Esr	152 140.12

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-269

Improper Privilege Management

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	mozilla	firefox	152	/	/	/	/	/	/	/
a	mozilla	firefox_esr	140.12	/	/	/	/	/	/	/

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2040477

https://www.mozilla.org/security/advisories/mfsa2026-57/

https://www.mozilla.org/security/advisories/mfsa2026-58/

CVSS Score

4.7 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: NONE
Scope: CHANGED
Confidentiality Impact: LOW
Integrity Impact: NONE
Availability Impact: NONE

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

View Vector String

Timeline

Published: June 16, 2026, 1:16 p.m.
Last Modified: June 16, 2026, 3:16 p.m.

Status : Undergoing Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-12313