CVE-2026-0719Libsoup: signed to unsigned conversion error leading to stack-based buffer overflow in libsoup ntlm authentication

Description

A flaw was identified in the NTLM authentication handling of the libsoup HTTP library, used by GNOME and other applications for network communication. When processing extremely long passwords, an internal size calculation can overflow due to improper use of signed integers. This results in incorrect memory allocation on the stack, followed by unsafe memory copying. As a result, applications using libsoup may crash unexpectedly, creating a denial-of-service risk.

Timeline

Scores

EPSS (exploitation in 30 days)

0.61% · top 50% of all CVEs (12 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.

Affected products

• Red Hat · Red Hat Enterprise Linux 10

  • unaffected 0:3.6.5-3.el10_1.9 – < *

• Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support

  • unaffected 0:3.6.5-3.el10_0.14 – < *

• Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support

  • unaffected 0:2.62.2-11.el7_9 – < *

• Red Hat · Red Hat Enterprise Linux 8

  • unaffected 0:8.10-7 – < *

• Red Hat · Red Hat Enterprise Linux 8

  • unaffected 0:2.62.3-13.el8_10 – < *

• Red Hat · Red Hat Enterprise Linux 8

  • unaffected 0:2.62.3-13.el8_10 – < *

• Red Hat · Red Hat Enterprise Linux 8.2 Advanced Update Support

  • unaffected 0:2.62.3-1.el8_2.8 – < *

• Red Hat · Red Hat Enterprise Linux 8.2 Advanced Update Support

  • unaffected 0:8.10-7.el8_2.1 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

  • unaffected 0:2.62.3-2.el8_4.8 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

  • unaffected 0:8.10-7.el8_4.1 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

  • unaffected 0:2.62.3-2.el8_4.8 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

  • unaffected 0:8.10-7.el8_4.1 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

  • unaffected 0:2.62.3-2.el8_6.8 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

  • unaffected 0:8.10-7.el8_6.1 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Telecommunications Update Service

  • unaffected 0:2.62.3-2.el8_6.8 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Telecommunications Update Service

  • unaffected 0:8.10-7.el8_6.1 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions

  • unaffected 0:2.62.3-2.el8_6.8 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions

  • unaffected 0:8.10-7.el8_6.1 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service

  • unaffected 0:2.62.3-3.el8_8.8 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service

  • unaffected 0:8.10-7.el8_8.1 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

  • unaffected 0:2.62.3-3.el8_8.8 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

  • unaffected 0:8.10-7.el8_8.1 – < *

• Red Hat · Red Hat Enterprise Linux 9

  • unaffected 0:2.72.0-12.el9_7.5 – < *

• Red Hat · Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

  • unaffected 0:2.72.0-8.el9_0.9 – < *

• Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

  • unaffected 0:2.72.0-8.el9_2.10 – < *

• Red Hat · Red Hat Enterprise Linux 9.4 Extended Update Support

  • unaffected 0:2.72.0-8.el9_4.9 – < *

• Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support

  • unaffected 0:2.72.0-10.el9_6.6 – < *

• Red Hat · Red Hat OpenShift Dev Spaces (RHOSDS) 3.26

  • unaffected 1770851052 – < *

• Red Hat · Red Hat OpenShift Dev Spaces (RHOSDS) 3.26

  • unaffected 1770918006 – < *

• Red Hat · Red Hat OpenShift Dev Spaces (RHOSDS) 3.26

  • unaffected 1770913862 – < *

• Red Hat · Red Hat Enterprise Linux 6

  All versions: unknown

What to do

Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• EUVD EUVD-2026-1573 (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-0719](https://cveledger.app/badge/CVE-2026-0719.svg)](https://cveledger.app/cve/CVE-2026-0719)

Record last updated 4 Nov 2026, 21:46 UTC.