CVE-2026-8958Patch(mozilla / firefox)

LOWCVSS 8.6 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch mozilla firefox systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-668CWE-693

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

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

  • firefox
  • thunderbird

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
Products
firefoxthunderbird

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-05-19: 1Patch / Workaround · 2026-05-19: 1Technical Details · 2026-05-19: 105-19
Signal classification1 categories
Patch
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • CVE@CVEnew
    Patch

    CVE-2026-8958 Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, … https://www.cve.org/CVERecord?id=CVE-2026-8958

    Post summary

    The CVE-2026-8958 is an information disclosure and sandbox escape vulnerability that has been patched in recent Firefox and Thunderbird releases; no exploitation or PoC is reported.

    00000189
    57.5K followersView on X
CPE platform detail4 entries

4 of 4 entries

PartVendorProductVersionTarget SWTarget HW
Appmozillafirefox---
Appmozillafirefox---
Appmozillathunderbird---
Appmozillathunderbird---

Explore more