Exposure of Data Element to Wrong Session in cURL - CVE-2026-5773

Vulnerability identifier: #VU128451

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-5773

CWE-ID: CWE-488

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper reuse of connection for SMB(S) transfers. A remote attacker can gain access to sensitive information on the system.

cURL
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Ubuntu
Basesystem Module
openSUSE Leap
openEuler
Anolis OS
LANTIME Operating System Firmware (LTOS)
curl (Ubuntu package)
curl-help
libcurl-devel
libcurl
curl-debugsource
curl-debuginfo
curl
libcurl4-debuginfo-32bit
libcurl4
libcurl4-32bit
libcurl4-debuginfo
curl-minimal
libcurl-minimal
curl-doc
libcurl4-64bit
libcurl-devel-64bit
libcurl4-64bit-debuginfo
libcurl-devel-doc
curl-zsh-completion
curl-fish-completion
curl-mini-debugsource
libcurl-mini4-debuginfo
libcurl-mini4
libcurl4-32bit-debuginfo
libcurl-devel-32bit

Install updates from vendor's website.

cURL - update to 8.20.0
LANTIME Operating System Firmware (LTOS) - update to 7.10.012
curl (Ubuntu package) - addressed in versions 7.35.0-1ubuntu2.20+esm21, 7.47.0-1ubuntu2.19+esm17, 7.58.0-2ubuntu3.24+esm10, 7.68.0-1ubuntu2.25+esm5, 7.81.0-1ubuntu1.24, 8.5.0-2ubuntu10.9, 8.5.0-2ubuntu10.11, 8.14.1-2ubuntu1.3, 8.14.1-2ubuntu1.5, 8.18.0-1ubuntu2.1, 8.18.0-1ubuntu2.3
curl-help - addressed in versions 7.71.1-48, 7.79.1-49, 8.4.0-29, 8.4.0-30
libcurl-devel - addressed in versions 7.71.1-48, 7.79.1-49, 8.4.0-29, 8.4.0-30
libcurl - addressed in versions 7.71.1-48, 7.79.1-49, 8.4.0-29, 8.4.0-30
curl-debugsource - addressed in versions 7.71.1-48, 7.79.1-49, 8.4.0-29, 8.4.0-30
curl-debuginfo - addressed in versions 7.71.1-48, 7.79.1-49, 8.4.0-29, 8.4.0-30
curl - addressed in versions 7.71.1-48, 7.79.1-49, 8.4.0-29, 8.4.0-30
libcurl4-debuginfo-32bit - update to 8.0.1-11.123.1
curl-debugsource - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1, 8.14.1-150700.7.23.1
libcurl4 - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1, 8.14.1-150700.7.23.1
libcurl4-32bit - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1, 8.14.1-150700.7.23.1
curl-debuginfo - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1, 8.14.1-150700.7.23.1
libcurl-devel - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1, 8.14.1-150700.7.23.1
libcurl4-debuginfo - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1, 8.14.1-150700.7.23.1
curl - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1, 8.14.1-150700.7.23.1
curl-minimal - update to 8.4.0-17
curl - update to 8.4.0-17
libcurl - update to 8.4.0-17
libcurl-devel - update to 8.4.0-17
libcurl-minimal - update to 8.4.0-17
curl-doc - update to 8.4.0-17
libcurl4-64bit - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1
libcurl-devel-64bit - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1
libcurl4-64bit-debuginfo - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1
libcurl-devel-doc - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1
curl-zsh-completion - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1
curl-fish-completion - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1
curl-mini-debugsource - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1
libcurl-mini4-debuginfo - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1
libcurl-mini4 - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1
libcurl4-32bit-debuginfo - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1, 8.14.1-150700.7.23.1
libcurl-devel-32bit - addressed in versions 8.14.1-150400.5.91.1, 8.14.1-150600.4.51.1

• https://curl.se/docs/CVE-2026-5773.html

• Multiple vulnerabilities in curl
• Ubuntu update for curl
• Anolis OS update for curl
• openEuler 20.03 LTS SP4 update for curl
• openEuler 24.03 LTS SP3 update for curl
• openEuler 24.03 LTS update for curl
• openEuler 22.03 LTS SP4 update for curl
• openEuler 24.03 LTS SP1 update for curl
• SUSE update for curl
• Ubuntu update for curl
• Multiple vulnerabilities in Meinberg LANTIME Operating System Firmware
• SUSE update for curl
• SUSE update for curl
• SUSE update for curl