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HIGH

CVE-2026-1761

CVSS v3

8.6

HIGH

EPSS Score

1.1 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libsoupAlmaLinux:9all versions · fixed in 2.72.0-12.el9_7.5and 1 other package
  • libsoupAlmaLinux:8all versions · fixed in 2.62.3-13.el8_10and 1 other package
  • libsoup3-docAlmaLinux:10all versions · fixed in 3.6.5-3.el10_1.10

Vendor advisories

  • CVE-2026-1761 Red Hat Product Security379 products fixed · 3 known affected

    libsoup: Stack-Based Buffer Overflow in libsoup Multipart Response Parsingmultipart HTTP response

    libsoup as a component of Red Hat Enterprise Linux 6 · libsoup-devel as a component of Red Hat Enterprise Linux 6 · libsoup.src as a component of Red Hat Enterprise Linux 6

  • RHSA-2026:2844 Red Hat Product Security12 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Dev Spaces 3.26.1 Release.

  • RHSA-2026:2628 Red Hat Product Security22 products fixed

    Red Hat Security Advisory: libsoup security update

  • RHSA-2026:2528 Red Hat Product Security6 products fixed

    Red Hat Security Advisory: spice-client-win security update

  • RHSA-2026:2529 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: spice-client-win security update

  • RHSA-2026:2514 Red Hat Product Security6 products fixed

    Red Hat Security Advisory: spice-client-win security update

15 more advisories

Full record on NVD

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Published
2026-02-02
Last Modified
2026-04-14

Frequently asked questions

What is CVE-2026-1761?

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.

Is CVE-2026-1761 actively exploited?

Active exploitation of CVE-2026-1761 has not been confirmed. Its EPSS score was 1.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-1761?

CVE-2026-1761 has a CVSS v3 base score of 8.6 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L.

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