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 handling. Mozilla says it was fixed in Firefox 147.0.2. Because browser compromise can affect sensitive data and endpoint integrity, unpatched Firefox installations should be treated as a timely desktop-browser patching priority.
Executive priority
Treat as high priority for routine emergency browser patching, not as confirmed active exploitation. The business risk is broad endpoint exposure and possible compromise from browser-rendered content if users remain on unfixed Firefox builds.
Technical view
The issue is a CWE-416 use-after-free in Firefox's Layout: Scrolling and Overflow component. The CVSS 3.1 score is 8.8 with network attack vector, low complexity, no privileges required, user interaction required, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to Firefox installations that have not received the 147.0.2 fix. The source bundle does not identify an exact vulnerable version range, affected operating systems, or downstream package status beyond the listed Mozilla and Red Hat references.
Exploitation context
The bundle does not show CISA KEV listing or cite active exploitation. CVSS indicates exploitation would require user interaction with browser-rendered content, but no public exploit status or attack details are provided in the supplied sources.
Researcher notes
Evidence is thin in the provided bundle: component, CWE, CVSS, and fixed version are known, but root-cause details, exploitability notes, affected range, and reliable detection indicators are not. Avoid assuming exploitation until KEV or vendor evidence changes.
Mitigation direction
- Update Firefox to version 147.0.2 or later where available.
- Check Mozilla advisory MFSA2026-06 for vendor guidance.
- Check Red Hat guidance for distribution package status.
- Prioritize managed desktop and server GUI environments using Firefox.
- Use browser inventory to find unsupported or unmanaged installations.
Validation and detection
- Confirm installed Firefox versions across managed endpoints.
- Verify update channels report Firefox 147.0.2 or later.
- Review software inventory for unmanaged Firefox installs.
- Check Red Hat CVE and CSAF records for package applicability.
- Monitor Mozilla and Red Hat references for revised affected ranges.
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.