Cleartext transmission of sensitive information in cURL - CVE-2026-4873

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU128445

Cleartext transmission of sensitive information in cURL - CVE-2026-4873

Published: April 29, 2026


Vulnerability identifier: #VU128445
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-4873
CWE-ID: CWE-319
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to connection reuse ignores TLS requirement. A remote attacker can gain access to sensitive data.


Affected software

cURL
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Real Time 15
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Micro
Basesystem Module
openSUSE Leap
openEuler
Ubuntu
Anolis OS
curl
curl-debuginfo
curl-debugsource
libcurl
libcurl-devel
curl-help
curl (Ubuntu package)
libcurl4-debuginfo
libcurl4-32bit
libcurl4
libcurl4-debuginfo-32bit
curl-doc
libcurl-minimal
curl-minimal
curl-mini-debugsource
libcurl4-64bit-debuginfo
libcurl-devel-64bit
libcurl4-64bit
libcurl-devel-32bit
libcurl-devel-doc
curl-fish-completion
curl-zsh-completion
libcurl-mini4
libcurl-mini4-debuginfo
libcurl4-32bit-debuginfo

How to mitigate CVE-2026-4873

Install updates from vendor's website.

cURL - update to 8.20.0
curl - 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-debugsource - 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
libcurl-devel - addressed in versions 7.71.1-48, 7.79.1-49, 8.4.0-29, 8.4.0-30
curl-help - addressed in versions 7.71.1-48, 7.79.1-49, 8.4.0-29, 8.4.0-30
curl (Ubuntu package) - addressed in versions 7.81.0-1ubuntu1.24, 8.5.0-2ubuntu10.9, 8.14.1-2ubuntu1.3, 8.18.0-1ubuntu2.1
libcurl-devel - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1, 8.14.1-150700.7.20.1
libcurl4-debuginfo - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1, 8.14.1-150700.7.20.1
curl - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1, 8.14.1-150700.7.20.1
curl-debuginfo - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1, 8.14.1-150700.7.20.1
libcurl4-32bit - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1, 8.14.1-150700.7.20.1
curl-debugsource - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1, 8.14.1-150700.7.20.1
libcurl4 - addressed in versions 8.0.1-11.123.1, 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1, 8.14.1-150700.7.20.1
libcurl4-debuginfo-32bit - update to 8.0.1-11.123.1
curl-doc - update to 8.4.0-18
curl - update to 8.4.0-18
libcurl-minimal - update to 8.4.0-18
libcurl-devel - update to 8.4.0-18
libcurl - update to 8.4.0-18
curl-minimal - update to 8.4.0-18
curl-mini-debugsource - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1
libcurl4-64bit-debuginfo - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1
libcurl-devel-64bit - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1
libcurl4-64bit - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1
libcurl-devel-32bit - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1
libcurl-devel-doc - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1
curl-fish-completion - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1
curl-zsh-completion - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1
libcurl-mini4 - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1
libcurl-mini4-debuginfo - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1
libcurl4-32bit-debuginfo - addressed in versions 8.14.1-150400.5.83.1, 8.14.1-150600.4.43.1, 8.14.1-150700.7.20.1

External References

Related Security Bulletins