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CVE Record

CVE-2026-8093: Memory safety bugs fixed in Firefox 150.0.2

Memory safety bugs present in Firefox 150.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.2 and Thunderbird 150.0.2.

HighCVSS 8.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Mozilla fixed memory safety bugs in Firefox and Thunderbird 150.0.2. The concern is that memory corruption could potentially be turned into arbitrary code execution. There is no source-provided evidence of active exploitation, but the impact is high enough to justify prompt patching.

Executive priority

Treat as a high-priority endpoint patching item, not a confirmed active incident from the provided evidence. The business risk is arbitrary code execution through memory corruption in common client software if vulnerable versions remain deployed.

Technical view

CVE-2026-8093 covers memory safety flaws reported as present in Firefox 150.0.1 and fixed in Firefox 150.0.2 and Thunderbird 150.0.2. Mozilla describes evidence of memory corruption and possible exploitability with enough effort. CVSS 3.1 is 8.1, with high confidentiality, integrity, and availability impact.

Likely exposure

Organizations are likely exposed where Firefox or Thunderbird are below the fixed 150.0.2 release. The bundle’s affected-version field lists 150.0.2, but the description says 150.0.2 is the fix, so validate against Mozilla guidance.

Exploitation context

The provided data does not show CISA KEV listing or active exploitation. Mozilla states some bugs showed memory corruption and could potentially be exploited to run arbitrary code. Attack complexity is rated high in the CVSS vector.

Researcher notes

Key technical signals are CWE-119/CWE-120, memory corruption, possible arbitrary code execution, and CVSS AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Public detail in the bundle is limited; avoid assuming exploit primitives or affected code paths beyond Mozilla’s advisory language.

Mitigation direction

  • Update Firefox to 150.0.2 or later where deployed.
  • Update Thunderbird to 150.0.2 or later where deployed.
  • Use Mozilla advisories as the primary remediation reference.
  • Check Red Hat guidance for managed Linux package status.
  • Prioritize endpoints handling untrusted web or email content.

Validation and detection

  • Inventory Firefox and Thunderbird versions across managed endpoints.
  • Confirm installed versions are 150.0.2 or later.
  • Review Mozilla MFSA-2026-40 and MFSA-2026-43 for product guidance.
  • Check Red Hat CVE and VEX records where Red Hat packages are used.
  • Monitor KEV and vendor advisories for exploitation status changes.
Prepared
Confidence
medium
Sources
8

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 · low confidence lookup

CWE-119: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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.

Open ATT&CK lookup
cwe · low confidence lookup

CWE-120: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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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description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-8093 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
High
CVSS
8.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/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
7Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical 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
8.1CVSS 3.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9CISA-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

8.1High
CVSS 3.1 vector shape for CVE-2026-8093Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/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: Memory safety bugs fixed in Firefox 150.0.2
other:Red Hat severity ratingcvssV3_1
  • 2026-05-07T13:01:03.421Z: Reported to Red Hat.
  • 2026-05-07T12:45:07.540Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
MozillaFirefox150.0.2Listed
MozillaThunderbird150.0.2Listed
Weakness

CWE details

CWE-119CWE-120

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