CVE-2026-8970
📛 CVE Title
Privilege escalation in the Security component
Description
Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- mozilla
- CVSS severity
- high
- CVSS score
- 8.8 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Effective score
- 8.8 / 10 HIGH source: CNA overview
- CWE(s)
- —
- Reserved
- 2026-05-19
- Published
- 2026-05-19 12:30 UTC
- Last updated
- 2026-05-20 15:38 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/8xxx/CVE-2026-8970.json
- Linked Threat
- CVE-2026-8970 — CVE-2026-8970
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-19 14:16:53 UTC
- NVD last modified
- 2026-05-20 17:34:49 UTC
- NVD CVSS v3.1
- 8.8 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Exploitability subscore
- 2.8 / 10
- Impact subscore
- 5.9 / 10
- EPSS score
- 0.0004 (probability of exploitation in next 30 days)
- EPSS percentile
- 12.43% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD-assigned CWE(s):
CWE-269
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-05-25 00:32 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-30920 - Assigner
- mozilla
- Published
- May 19, 2026, 12:30:17 PM
- Updated
- May 20, 2026, 3:38:16 PM
- EUVD base score (CVSS 3.1)
-
8.8 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EUVD-reported EPSS
- 0.0400
- Aliases
-
GHSA-qqf4-pjxf-9rj2
ENISA description: Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
EUVD references (5)
Affected products (2)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Mozilla | Firefox |
140.11 (unaffected),
151 (unaffected)
|
— |
| Mozilla | Thunderbird |
140.11 (unaffected),
151 (unaffected)
|
— |
Affected products — CPE 2.3 (4) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
Vendor references (5)
References embedded in the original CVE record by the assigning CNA.
Web references (14)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- http://www.mozilla.org/security/announce/2026/mfsa2026-51.html rapid7:www.mozilla.org
- http://www.mozilla.org/security/announce/2026/mfsa2026-48.html rapid7:www.mozilla.org
- https://attackerkb.com/topics/CVE-2026-8970 rapid7:attackerkb.com
- http://www.mozilla.org/security/announce/2026/mfsa2026-46.html rapid7:www.mozilla.org
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30920 rapid7:euvd.enisa.europa.eu
- http://cwe.mitre.org/data/definitions/269.html rapid7:cwe.mitre.org
- https://www.mozilla.org/security/advisories/mfsa2026-48/ tenable:www.mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2026-50/ tenable:www.mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2026-51/ tenable:www.mozilla.org
- https://bugzilla.mozilla.org/show_bug.cgi?id=2032174 tenable:bugzilla.mozilla.org
- https://nvd.nist.gov/vuln/detail/CVE-2026-8970 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-8970 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
- https://www.mozilla.org/security/advisories/mfsa2026-46/ tenable:www.mozilla.org
NVD-tagged references (5)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://bugzilla.mozilla.org/show_bug.cgi?id=2032174 security@mozilla.org Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-46/ security@mozilla.org Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-48/ security@mozilla.org Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-50/ security@mozilla.org Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-51/ security@mozilla.org Vendor Advisory
Remediations (20)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:access.redhat.com
Security Fix (es): nginx: NGINX: Arbitrary Code Execution Vulnerability ( CVE - 2026 -42945) For more details about the security issue (s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page (s) listed in the References section.
2026-05-23 22:18 UTC -
web:epatch.pa.gov
Why does PATCH exist? Its purpose is to better enable the public to obtain criminal history record checks. The repository was created and is maintained in accordance with Pennsylvania's Criminal History Information Act contained in Chapter 91 of Title 18, Crimes Code. This Act also directs the Pennsylvania State Police (PSP) to disseminate criminal history data to criminal justice agencies ...
2026-05-23 22:18 UTC -
web:forums.ea.com
About This Thread This thread tracks Sims 4 mods and CC that have been "broken" or made obsolete by game update1.124, May 12, 2026 , and the May 21 hotfix, or declared unsupported by their creators. It also tracks updated game mods, important updates to custom content, general news from/about creators, and new bugfix mods.
2026-05-23 22:18 UTC -
web:patch.com
New Lenox Latest Headlines: Shoes Needed: Couple On International Adoption Journey In Final Push To Collect 2,500 Pairs For Those In Need; Box Truck Struck By Metra Train After Driver Went Around ...
2026-05-23 22:18 UTC -
web:patch.moe
Age Verification Are you 18 years or older? YES NO
2026-05-23 22:18 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.
2026-05-23 22:18 UTC -
web:www.leagueoflegends.com
League of Legends Patch 26.5 Notes Welcome to the official patch of First Stand, the first major international tournament of the year!
2026-05-23 22:18 UTC -
web:www.microsoft.com
A high-severity Linux vulnerability, "Copy Fail" ( CVE - 2026 -31431), enables root privilege escalation across cloud environments and Kubernetes workloads. With a working exploit already in the wild, organizations should act quickly to detect, mitigate, and reduce risk.
2026-05-23 22:18 UTC -
web:www.oracle.com
Oracle Critical Patch Update Advisory - January 2026 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical ...
2026-05-23 22:18 UTC -
web:www.patchhawaii.org
PATCH provides access to registered and licensed child care, offers child care subsidies to eligible families, provides child development training and ECE scholarship opportunities, and assists those interested in starting a family child care business. PATCH is a free resource hub for families, child care professionals and communities of Hawaii.
2026-05-23 22:18 UTC -
web:app.opencve.io
The risk remains significant because elevated privileges can bypass security controls, but the absence of publicly reported exploitation or a known exploit reduces immediate threat yet mandates prompt remediation . Generated by OpenCVE AI on May 20, 2026 at 17:36 UTC.
2026-05-26 02:58 UTC -
web:cybersecuritynews.com
Microsoft Exchange Server spoofing flaw, is being actively exploited against on-premises systems before a permanent patch is available.
2026-05-26 02:58 UTC -
web:github.com
GitHub is where people build software. More than 150 million people use GitHub to discover, fork, and contribute to over 420 million projects.
2026-05-26 02:58 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-05-26 02:58 UTC -
web:securityvulnerability.io
What is CVE-2026-8970 ? This vulnerability allows attackers to escalate privileges within the Security component of Firefox, potentially enabling unauthorized access to system functions or sensitive data.
2026-05-26 02:58 UTC -
web:techcommunity.microsoft.com
We wanted to tell you how to address the Exchange Server May 2026 vulnerability CVE - 2026 -42897.
2026-05-26 02:58 UTC -
web:ubuntu.com
Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things.
2026-05-26 02:58 UTC -
web:windowsforum.com
Microsoft's Fastest Fix Is a Mitigation , Not a Patch The important detail in Microsoft's May 14 notice is that there is no permanent Exchange security update available yet for CVE - 2026 -42897. Microsoft says it is working on one and will release it later for affected supported paths, but today's defensive action is mitigation .
2026-05-26 02:58 UTC -
web:www.forbes.com
Updated May 18: This article has been updated to include further details on the emergency mitigation process recommended by Microsoft after the CVE - 2026 -42897 Exchange Server zero-day was ...
2026-05-26 02:58 UTC -
web:www.thehackerwire.com
How severe is CVE-2026-8970 ? What Mozilla products are affected by CVE-2026-8970 ? How do I fix or mitigate CVE-2026-8970 ? When was CVE-2026-8970 disclosed?
2026-05-26 02:58 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-8970.json.
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