VulnSocial

CVE-2026-8956Patch(mozilla / firefox)

LOWCVSS 9.8 · CRITICAL

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Patch mozilla firefox systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

mozilla CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-190

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
  • 2 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 2 signals
  • 2 total mentions across 1 day

Affected systems

Vendors
mozilla
Products
firefoxthunderbird

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-05-19: 2Patch / Workaround · 2026-05-19: 2Technical Details · 2026-05-19: 205-19
Signal classification1 categories
Patch
2100.0%
Referenced assets2 URLs
By indicator
Full discourse2 posts
  • Infoflowcloud@infoflowcloud
    Patch

    🚨*CVE* CVE-2026-8956 Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. https://www.cve.org/CVERecord?id=CVE-2026-8956 ----- Traducción: CVE-2026-8956 desborde de enter… http://infoflow.cloud`

    Post summary

    The tweet announces CVE‑2026‑8956, an integer overflow in Firefox and Thunderbird’s JAR component, and notes that it has been fixed in specific release versions.

    0000052
    78 followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-8956 Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. https://www.cve.org/CVERecord?id=CVE-2026-8956

    Post summary

    CVE‑2026‑8956 is an integer overflow in Firefox’s JAR component that is fixed in recent Firefox and Thunderbird releases; no PoC, exploit, or active exploitation is reported.

    00000181
    57.5K followersView on X
CPE platform detail4 entries

4 of 4 entries

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

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