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CVE-2026-5260

📛 CVE Title

Debian: CVE-2026-5260: gnutls28 -- security update

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Description

Debian: CVE-2026-5260: gnutls28 -- security update

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-5260 on 2026-07-27. Shown when MITRE's text differs from the cvelistV5 mirror.

A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.

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-2026-5260/
Linked Threat
CVE-2026-5260 — CVE-2026-5260

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 22:16:44 UTC
NVD last modified
2026-07-24 12:10:00 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:N/A:H
Exploitability subscore
3.9 / 10
Impact subscore
4.2 / 10
EPSS score
0.0073 (probability of exploitation in next 30 days)
EPSS percentile
50.39% vs all CVEs — higher = more likely to be exploited, as of 2026-07-26

NVD-assigned CWE(s): CWE-126 (differs from the CNA list above)

NVD / KEV / EPSS data refreshed 2026-07-27 10:37 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-2026-32009
Assigner
redhat
Published
May 26, 2026, 9:29:20 PM
Updated
Jul 22, 2026, 3:03:17 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:N/A:H
EUVD-reported EPSS
0.7300
Vendors
Red Hat
Products
Red Hat Enterprise Linux 8 (patch: 0:3.6.16-8.el8_10.6)
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions (patch: 0:4.13-4.el8_8.1)
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 Advanced Mission Critical Update Support (patch: 0:4.13-3.el8_6.2)
Red Hat Enterprise Linux 8.8 Telecommunications Update Service (patch: 0:3.6.16-7.el8_8.4)
Red Hat Enterprise Linux 10.0 Extended Update Support (patch: 0:3.8.9-9.el10_0.19)
Red Hat Update Infrastructure 5 (patch: 1781525671)
Red Hat Hardened Images (patch: 3.8.13-1.hum1)
Red Hat Enterprise Linux 9 (patch: 0:3.8.10-4.el9_8)
Red Hat Enterprise Linux 8.8 Telecommunications Update Service (patch: 0:4.13-4.el8_8.1)
Red Hat Enterprise Linux 10 (patch: 0:3.8.10-4.el10_2)
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 8.4 Extended Update Support Long-Life Add-On (patch: 0:4.13-3.el8_4.1)
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions (patch: 0:3.7.6-21.el9_2.7)
Red Hat Update Infrastructure 5 (patch: 1781525739)
Red Hat OpenShift Container Platform 4.19 (patch: 4.19.9.6.202607151909-0)
Red Hat Update Infrastructure 5 (patch: 1781525693)
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (patch: 0:3.6.14-10.el8_4.1)
Red Hat Update Infrastructure 5 (patch: 1781525684)
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (patch: 0:3.6.16-5.el8_6.5)
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions (patch: 0:3.8.3-4.el9_4.6)
Red Hat Discovery 2 (patch: 1782159791)
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 Extended Update Support Long-Life Add-On (patch: 0:4.13-3.el8_6.2)
Red Hat Discovery 2 (patch: 1782166952)
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On (patch: 0:3.6.16-5.el8_6.5)
Red Hat Enterprise Linux 9.6 Extended Update Support (patch: 0:3.8.3-6.el9_6.4)
Aliases
GHSA-6hj5-4cv5-f46x

ENISA description: A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.

EUVD references (17)

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:N/A:H
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 (12) 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 (17)

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 (16)

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

  • Microsoft and Adobe Patch Tuesday, May 2026 Security Update Review
    web:blog.qualys.com

    May 2026's Patch Tuesday arrives with Microsoft addressing a fresh set of vulnerabilities across its ecosystem, reinforcing the ongoing need for timely patching in an increasingly threat-heavy…

    2026-06-04 08:43 UTC
  • CVE-2026-5260 | High | CVETodo
    web:cvetodo.com

    How do I fix CVE-2026-5260 ? To remediate CVE-2026-5260 : Check Red Hat's security advisories for official patches and updates. Update Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 to the latest patched version. Review the references section below for vendor advisories and mitigation guidance.

    2026-06-04 08:43 UTC
  • Microsoft Patch Tuesday May 2026 - 120 Vulnerabilities Fixed, Including ...
    web:cybersecuritynews.com

    Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.

    2026-06-04 08:43 UTC
  • Nvd - Cve-2026-25260
    web:nvd.nist.gov

    Information Technology Laboratory National Vulnerability Database Vulnerabilities

    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
  • Microsoft May 2026 Patch Tuesday Fixes 120 Flaws
    web:thecyberexpress.com

    Microsoft has rolled out its May 2026 Patch Tuesday security updates, delivering fixes for approximately 120 vulnerabilities across Windows, Microsoft Office, networking services, and enterprise platforms.

    2026-06-04 08:43 UTC
  • Microsoft's May 2026 Patch Tuesday Fixes 130+ Vulnerabilities ...
    web:windowsreport.com

    Microsoft has released its May 2026 Patch Tuesday updates for Windows 11 and Windows 10, shipping as KB5089549 and KB5087544. The updates include fixes for more than 130 security vulnerabilities across Windows, Office, SharePoint, DNS components, and core system services, as Bleeping Computer writes. While no publicly disclosed zero-day vulnerabilities were reported this month, the […]

    2026-06-04 08:43 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.

    2026-06-04 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
  • Microsoft Confirms Defender RoguePlanet 0-Day Exploit and Working to ...
    web:cybersecuritynews.com

    Microsoft has officially acknowledged a critical zero-day vulnerability in Microsoft Defender, publicly dubbed "RoguePlanet," and confirmed it is actively developing a security patch to address the flaw.

    2026-06-19 02:26 UTC
  • June 9, 2026—KB5094126 (OS Builds 26200.8655 and 26100.8655)
    web:support.microsoft.com

    Improvements This update includes new features and quality improvements that were part of the following update: May 12, 2026—KB5089549 (OS Builds 26200.8457 and 26100.8457) May 26, 2026—KB5089573 (OS Builds 26200.8524 and 26100.8524) This update addresses security vulnerabilities documented in the following guide: June 2026 Security Updates. The following summary outlines key quality ...

    2026-06-19 02:26 UTC
  • CISA Adds Two Known Exploited Vulnerabilities to Catalog
    web:www.cisa.gov

    BOD 26-04 reinforces the importance of the KEV catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures ( CVEs ) listed in CISA's Known Exploited Vulnerabilities (KEV) catalog on publicly exposed assets that grant total control of ...

    2026-06-19 02:26 UTC
  • Microsoft working on a fix for RoguePlanet, a flaw that grants full PC ...
    web:www.malwarebytes.com

    Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.

    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
  • February 2026 Security Patch Report: Microsoft, SAP, Intel, Adobe, and ...
    web:www.rescana.com

    Immediate patching is the most effective mitigation strategy. Organizations should prioritize the deployment of all relevant security updates from Microsoft, SAP, Intel, Adobe, and other vendors as soon as possible. For Microsoft products, apply all Patch Tuesday updates and monitor for suspicious privilege escalation and security bypass activity.

    2026-06-19 02:26 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-5260.json.

Not stored.