s2
--:--:--UTC

Searching APEX

Starting…

  1. ○ Searching Threats, IOCs & Threat Intelligence locally
  2. ○ Querying external providers
  3. ○ Asking AI Forensic Validator
  4. ○ Creating new entry from validated hit

0s elapsed

CVE-2026-42013

📛 CVE Title

Debian: CVE-2026-42013: gnutls28 -- security update

⬇ Download JSON ⚠ View as Threat

Description

Debian: CVE-2026-42013: gnutls28 -- security update

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-42013 on 2026-07-27. Shown when MITRE's text differs from the cvelistV5 mirror.

A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to spoofing or man-in-the-middle attacks.

Overview

State
—
Assigner (CNA)
—
CVSS severity
high
CVSS score
CVSS 8.2 / 10 8.2 8.2 / 10
CVSS vector
AV:N/AC:L/Au:N/C:C/I:C/A:C
Effective score
8.2 / 10 HIGH source: CNA overview
MSRC score
8.2 / 10 HIGH MS rating: Important
CWE(s)
CWE-1284
Reserved
—
Published
2026-05-20 00:00 UTC
Last updated
2026-06-19 14:40 UTC
Source
https://www.rapid7.com/db/vulnerabilities/debian-cve-2026-42013/
Linked Threat
CVE-2026-42013 — CVE-2026-42013

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
2026-05-26 22:16:42 UTC
NVD last modified
2026-07-24 11:10:00 UTC
NVD CVSS v3.1
CVSS 8.2 / 10 8.2 8.2 / 10 HIGH source: secalert@redhat.com
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Exploitability subscore
3.9 / 10
Impact subscore
4.2 / 10
EPSS score
0.0042 (probability of exploitation in next 30 days)
EPSS percentile
34.68% vs all CVEs — higher = more likely to be exploited, as of 2026-07-26

NVD-assigned CWE(s): CWE-295 (differs from the CNA list above)

NVD / KEV / EPSS data refreshed 2026-07-27 10:28 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-2026-32011
Assigner
redhat
Published
May 26, 2026, 9:29:32 PM
Updated
Jul 22, 2026, 3:03:28 PM
EUVD base score (CVSS 3.1)
8.2 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
EUVD-reported EPSS
0.4200
Vendors
Red Hat
Products
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (patch: 0:3.6.16-5.el8_6.5)
Red Hat Enterprise Linux 9 (patch: 0:3.8.10-4.el9_8)
Red Hat Discovery 2 (patch: 1782166952)
Red Hat Enterprise Linux 8.8 Telecommunications Update Service (patch: 0:3.6.16-7.el8_8.4)
Red Hat OpenShift Container Platform 4.19 (patch: 4.19.9.6.202607151909-0)
Red Hat Update Infrastructure 5 (patch: 1781525671)
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions (patch: 0:3.7.6-21.el9_2.7)
Red Hat Enterprise Linux 7 Extended Lifecycle Support (patch: 0:3.3.29-9.el7_9.2)
Red Hat Update Infrastructure 5 (patch: 1781525684)
Red Hat Enterprise Linux 10.0 Extended Update Support (patch: 0:3.8.9-9.el10_0.19)
Red Hat Discovery 2 (patch: 1782159791)
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On (patch: 0:3.6.14-10.el8_4.1)
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions (patch: 0:4.13-4.el8_8.1)
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On (patch: 0:4.13-3.el8_6.2)
Red Hat Update Infrastructure 5 (patch: 1781525693)
Red Hat Enterprise Linux 8.8 Telecommunications Update Service (patch: 0:4.13-4.el8_8.1)
Red Hat Hardened Images (patch: 3.8.13-1.hum1)
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On (patch: 0:4.13-3.el8_4.1)
Red Hat Enterprise Linux 10 (patch: 0:3.8.10-4.el10_2)
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (patch: 0:4.13-3.el8_4.1)
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On (patch: 0:3.6.16-5.el8_6.5)
Red Hat Update Infrastructure 5 (patch: 1781525739)
Red Hat Enterprise Linux 9.6 Extended Update Support (patch: 0:3.8.3-6.el9_6.4)
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (patch: 0:3.6.14-10.el8_4.1)
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions (patch: 0:3.6.16-7.el8_8.4)
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (patch: 0:4.13-3.el8_6.2)
Red Hat Enterprise Linux 8 (patch: 0:3.6.16-8.el8_10.6)
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions (patch: 0:3.8.3-4.el9_4.6)
Aliases
GHSA-2pw7-g86g-76q7

ENISA description: A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to spoofing or man-in-the-middle attacks.

EUVD references (18)

Microsoft Security Response Center MSRC

Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-09-25 03:07 UTC (source: CVRF).

MS severity
Important
MS CVSS base score
8.2 / 10 (temporal 8.2)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Release
2026-May
Microsoft remediations / KB articles (2)

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

MITRE references (13) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (11)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (18)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (18)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • THREAT ADVISORY RedSun Zero-Day (Windows Defender) April 17, 2026
    web:blackswan-cybersecurity.com

    Cloud Files API activity originating outside legitimate OneDrive/sync processes. Mitigation Steps: Apply all Windows updates immediately (monitor MSRC for an emergency RedSun-specific patch . None released as of April 17, 2026 ). Supplement Defender with a secondary EDR solution (e.g., Huntress) capable of detecting Defender bypasses.

    2026-06-04 08:43 UTC
  • CVE-2026-42013 | Security Details | Sonatype Guide
    web:guide.sonatype.com

    Technical security analysis for CVE-2026-42013 . CVSS 8.2 severity. View CVSS vectors, CWE classifications, and exploit maturity ratings.

    2026-06-04 08:43 UTC
  • Patch Tuesday, April 2026 Edition - Krebs on Security
    web:krebsonsecurity.com

    For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?

    2026-06-04 08:43 UTC
  • NVD - Home
    web:nvd.nist.gov

    The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...

    2026-06-04 08:43 UTC
  • Security Update Guide - Microsoft
    web:portal.msrc.microsoft.com

    The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

    2026-06-04 08:43 UTC
  • Landing Page | ServiceNow Common Vulnerabilities & Exposures (CVE ...
    web:support.servicenow.com

    Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...

    2026-06-04 08:43 UTC
  • Investigating a New Click-Fix Variant - The Hacker News
    web:thehackernews.com

    New ClickFix variant maps WebDAV drive to run trojanized WorkFlowy app, enabling stealth C2 beacon and payload delivery.

    2026-06-04 08:43 UTC
  • April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
    web:www.crowdstrike.com

    Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

    2026-06-04 08:43 UTC
  • Oracle Critical Patch Update Advisory - April 2026
    web:www.oracle.com

    This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

    2026-06-04 08:43 UTC
  • Patch Tuesday June 2026: Security Updates & CVE Analysis
    web:zecurit.com

    Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

    2026-06-04 08:43 UTC
  • April 2026 Critical Patch Update Released | security - Oracle Blogs
    web:blogs.oracle.com

    For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

    2026-06-19 02:26 UTC
  • Security Advisories and Bulletins | Microsoft Learn
    web:learn.microsoft.com

    In this library you will find the following security documents that have been released by the Microsoft Security Response Center (MSRC). The MSRC investigates all reports of security vulnerabilities affecting Microsoft products and services, and releases these documents as part of the ongoing effort to help you manage security risks and help keep your systems protected. Please use the ...

    2026-06-19 02:26 UTC
  • Security Update Guide - Microsoft Security Response Center
    web:msrc.microsoft.com

    Security Update Guide - Microsoft Security Response Center

    2026-06-19 02:26 UTC
  • Description of the security update for Office 2016: January 26, 2026 ...
    web:support.microsoft.com

    Summary This security update resolves a Microsoft Word security feature bypass vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE - 2026 -21509.

    2026-06-19 02:26 UTC
  • May 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
    web:www.crowdstrike.com

    Microsoft has released security updates for 130 vulnerabilities, including 30 critical, in its May 2026 Patch Tuesday rollout.

    2026-06-19 02:26 UTC
  • Microsoft Technical Security Notifications
    web:www.microsoft.com

    Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.

    2026-06-19 02:26 UTC
  • Oracle Critical Security Patch Update Advisory - May 2026
    web:www.oracle.com

    This Critical Security Patch Update contains 35 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Security Patch Update and other Oracle Software Security Assurance activities is located at May 2026 Critical Security Patch Update: Executive Summary and Analysis.

    2026-06-19 02:26 UTC
  • Vulnerabilities Resolved in Veeam Backup & Replication 13.0.1.2067
    web:www.veeam.com

    When a vulnerability is identified, our team promptly develops a patch to address and mitigate the risk. In line with our dedication to transparency, we publicly disclose the vulnerability and provide detailed mitigation information.

    2026-06-19 02:26 UTC

AI Forensic Analysis

Only Available for Registered Users. Sign in to view.

Raw JSON

The full cvelistV5 record. Download as CVE-2026-42013.json.

Not stored.