CVE-2026-2785Network attack vector

Unspecified impact via invalid JavaScript-engine pointer

Published Feb 24, 2026 · Updated Feb 24, 2026

Invalid pointer handling in Mozilla Firefox and Thunderbird allows remote attackers to cause unspecified impact via crafted web content. Mozilla identifies the JavaScript Engine as the affected component but has not disclosed the pointer's code locus, invalid state, or dereference operation. Interaction with attacker-controlled content is required; Thunderbird normally disables scripting while reading email, limiting ordinary-message reachability.

CVSS severity9.8
Critical
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Invalid pointer handling in Mozilla Firefox and Thunderbird allows remote attackers to cause unspecified impact via crafted web content. Mozilla identifies the JavaScript Engine as the affected component but has not disclosed the pointer's code locus, invalid state, or dereference operation. Interaction with attacker-controlled content is required; Thunderbird normally disables scripting while reading email, limiting ordinary-message reachability.

The record

CVE
CVE-2026-2785
Published
Feb 24, 2026
Updated
Feb 24, 2026
Vendor
Mozilla
Product
Firefox
Classifications
CWE-824
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <148

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <148
Mozilla · Thunderbirdversion=unspecified <140.8; version=unspecified <148
Mozilla · Firefox ESRversion=unspecified <140.8

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-824Access of Uninitialized Pointer

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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