CVE-2026-1761Libsoup: stack-based buffer overflow in libsoup multipart response parsingmultipart http response

Description

A flaw was found in libsoup. This stack-based buffer overflow vulnerability occurs during the parsing of multipart HTTP responses due to an incorrect length calculation. A remote attacker can exploit this by sending a specially crafted multipart HTTP response, which can lead to memory corruption. This issue may result in application crashes or arbitrary code execution in applications that process untrusted server responses, and it does not require authentication or user interaction.

Timeline

Scores

EPSS (exploitation in 30 days)

1.1% · top 35% of all CVEs (12 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: partial

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

  • unaffected 0:3.6.5-3.el10_1.10 – < *

• 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: To mitigate this issue, applications utilizing libsoup that process HTTP responses should be configured to only communicate with trusted endpoints. Implement network egress filtering to restrict vulnerable applications from connecting to untrusted external services, thereby reducing the exposure to specially crafted multipart HTTP responses.

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-2026-5104 (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-2026-1761](https://cveledger.app/badge/CVE-2026-1761.svg)](https://cveledger.app/cve/CVE-2026-1761)

Record last updated 4 Nov 2026, 22:08 UTC.