CVE-2026-109721

LOW

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

Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

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0.0/ 10 priority

Sources & remediation

Other references

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

1 mentions across 1 observed day

What's happening

1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Referenced assets1 URL

By indicator

https://x.com/csirt_it/status/2110012513479758145

Full discourse1 post

Hephaestvs@Vulcanux_18h
csirt_it: ‼️ #Mozilla: disponibile proof of Concept (#PoC) per lo sfruttamento della CVE-2026-109721 relativa a #Firefox #FirefoxESR #Thunderbird Rischio: 🔴 ⚠ Aggiornare tempestivamente il software interessato 👉 link al post principale: https://x.com/csirt_it/status/2110012513479758145
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