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CVE-2026-117954

No known exploitation. EPSS puts it in the 8th percentile. Fixed versions are out.

CVSS —Not scoredEPSS percentile8th0.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix2 products3 fixed builds listed below
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Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Mozilla FirefoxFixed builds115.44, 153.6, 159Stated by: CVE record
  • Mozilla ThunderbirdFixed builds153.6, 159Stated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

What it is

From the CVE record

Use-after-free in the Layout: Positioned component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS8th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.2% chance of exploitation activity in the next 30 days, which ranks it in the 8th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

3 events over 0 days, from the signal feeds we watch.

  1. Publishedrecord updated, record updated

Affected products

Sources

References in the record

And 3 more references. See all after sign-in

In the news

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