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CVE Record

CVE-2026-8094: Other issue in the WebRTC component

Other issue in the WebRTC component. This vulnerability was fixed in Firefox ESR 140.10.2 and Thunderbird 140.10.2.

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A critical WebRTC vulnerability could allow remote code execution without authentication or user interaction. Successful exploitation may compromise confidentiality, integrity, and availability. Mozilla states the issue is fixed in Firefox ESR 140.10.2 and Thunderbird 140.10.2, making rapid updating the primary risk-reduction action.

Executive priority

Treat remediation as urgent because the stated impact is critical and requires neither authentication nor user interaction. Accelerate updates on internet-connected and high-value endpoints, while recognizing that the supplied evidence does not establish active exploitation.

Technical view

CVE-2026-8094 is a WebRTC issue classified as CWE-94. Its CVSS 3.1 score is 9.8, with network reachability, low attack complexity, no required privileges, and no user interaction. Public details do not identify the underlying defect or exploitation mechanics.

Likely exposure

Prioritize systems running Firefox ESR or Thunderbird below 140.10.2. The bundle does not provide a precise affected-version range, and its affected-version entries list the fixed releases, so exposure should be confirmed through Mozilla advisories and local version inventory.

Exploitation context

The supplied record is not in KEV, and no cited source in the bundle establishes active exploitation. The CVSS vector indicates potentially remote, unauthenticated exploitation without user interaction, but public technical detail is limited.

Researcher notes

Public information describes only an unspecified WebRTC issue and CWE-94 classification. The bundle does not disclose root cause, affected WebRTC pathways, indicators of compromise, or a complete vulnerable-version range. The discrepancy between the fixed-version description and affected-version entries limits precise exposure assessment.

Mitigation direction

  • Update Firefox ESR to 140.10.2 or later.
  • Update Thunderbird to 140.10.2 or later.
  • Review Mozilla guidance for platform-specific deployment requirements.
  • Review applicable Red Hat advisories for vendor-packaged installations.
  • Restrict or remove unsupported installations that cannot be promptly updated.

Validation and detection

  • Inventory installed Firefox ESR and Thunderbird versions.
  • Confirm managed endpoints report version 140.10.2 or later.
  • Verify updates completed successfully across all deployment channels.
  • Check vendor advisories for affected-version or package-specific clarifications.
  • Monitor security tooling for unusual activity involving affected applications.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-94: Code execution behavior lookup

Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-8094 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
28Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADP
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H1.65.9redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2026-8094Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc
redhat-SADPfirefox: thunderbird: Other issue in the WebRTC component
other:Red Hat severity ratingcvssV3_1
  • 2026-05-07T13:01:20.030Z: Reported to Red Hat.
  • 2026-05-07T12:45:08.185Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
MozillaFirefox140.10.2Listed
MozillaThunderbird140.10.2Listed
Weakness

CWE details

CWE-94

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-94 · source CWE mapping

Improper Control of Generation of Code ('Code Injection')

Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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