Security readout for executives and security teams
Plain-English summary
CVE-2026-24869 is a high-severity Firefox memory safety flaw in scrolling and overflow layout code. A user would need to interact with attacker-controlled content, but successful exploitation could affect confidentiality, integrity, and availability. Mozilla says the issue was fixed in Firefox 147.0.2.
Executive priority
Treat this as a prompt browser patching issue, not an emergency active-exploitation event based on the provided evidence. High impact and low attack complexity justify fast remediation across managed endpoints.
Technical view
The issue is a CWE-416 use-after-free in Firefox's Layout: Scrolling and Overflow component. CVSS 3.1 is 8.8 with network attack vector, low complexity, no privileges required, user interaction required, and high impact across confidentiality, integrity, and availability.
Likely exposure
Organizations with Mozilla Firefox deployments below the fixed 147.0.2 release are the likely concern. The provided bundle does not give a precise vulnerable version range, so asset teams should confirm installed Firefox versions against Mozilla guidance.
Exploitation context
The bundle does not cite active exploitation, and KEV status is false. The CVSS vector indicates exploitation would require user interaction with network-delivered content, but no exploit details or in-the-wild evidence are provided.
Researcher notes
Evidence supports a high-severity use-after-free fixed by Mozilla, but public detail is limited. The affected-version field in the bundle is ambiguous because it lists 147.0.2 while also saying that version contains the fix.
Mitigation direction
- Update Firefox to 147.0.2 or later where available.
- Check Mozilla's advisory for exact supported fixed releases.
- Prioritize managed browsers on user workstations and high-risk browsing environments.
- Use enterprise browser inventory to identify outdated Firefox installations.
Validation and detection
- Inventory Firefox versions across endpoints and VDI images.
- Confirm Firefox reports version 147.0.2 or later after remediation.
- Review vulnerability scanner findings against Mozilla advisory data.
- Track Red Hat advisories if Firefox is distributed through Red Hat packages.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-416: 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 lookupCVE-2026-24869 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.
SSVC decision data
CVSS vector scores
2 official scoresWe 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H1.65.9redhat-SADPVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- ADP timelineredhat-SADP
Made public.
- CVE publishedCVE Program
The CVE record was published.
- ADP timelineredhat-SADP
Reported to Red Hat.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-01-27T17:02:12.064Z: Reported to Red Hat.
- 2026-01-27T15:58:48.799Z: Made public.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.mozilla.org/show_bug.cgi?id=2008698CVE reference, mozilla
- https://www.mozilla.org/security/advisories/mfsa2026-06/CVE reference, mozilla
- https://access.redhat.com/security/cve/CVE-2026-24869CVE reference, redhat-SADP · vdb-entry, x_refsource_REDHAT
- RHBZ#2433424CVE reference, redhat-SADP · issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24869.jsonCVE reference, redhat-SADP · x_sadp-csaf-vex
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.