SUSE-SU-2026:5071-1: Security update for curl
This update for curl fixes the following issues:
- CVE-2026-8932: incomplete mTLS config matching in conn reuse (bsc#1268414). - CVE-2026-11856: cross-origin Digest auth state leak (bsc#1268426). - CVE-2026-12064: proto-default skips SSH verification (bsc#1268427). - CVE-2026-19931: Negotiate ambient user conn reuse (bsc#1277478). - CVE-2026-86409: stale SigV4 headers sent unintended (bsc#1285031). - CVE-2026-86410: redirect to SFTP or SCP bypasses host verification (bsc#1285030). - CVE-2026-86414: leaking host credentials to HTTP proxy (bsc#1285026). - CVE-2026-87864: IMAP APPEND plus CRLF conversion command injection (bsc#1285021). - CVE-2026-92388: FTP wildcard write callback mixup (bsc#1285016). - CVE-2026-92389: TFTP direction confusion (bsc#1285015). - CVE-2026-92391: curlmimefree stack overflow by recursion (bsc#1285013). - CVE-2026-94266: password leak in CURLINFOEFFECTIVEURL (bsc#1285010).
Other sources
This update for curl fixes the following issues: CVE-2026-8932: incomplete mTLS config matching in conn reuse (bsc#1268414). CVE-2026-11856: cross-origin Digest auth state leak (bsc#1268426). CVE-2026-12064: proto-default skips SSH verification (bsc#1268427). CVE-2026-19931: Negotiate ambient user conn reuse (bsc#1277478). CVE-2026-86409: stale SigV4 headers sent unintended (bsc#1285031). CVE-2026-86410: redirect to SFTP or SCP bypasses host verification (bsc#1285030). CVE-2026-86414: leaking host credentials to HTTP proxy (bsc#1285026). CVE-2026-87864: IMAP APPEND plus CRLF conversion command injection (bsc#1285021). CVE-2026-92388: FTP wildcard write callback mixup (bsc#1285016). CVE-2026-92389: TFTP direction confusion (bsc#1285015). CVE-2026-92391: curlmimefree stack overflow by recursion (bsc#1285013). CVE-2026-94266: password leak in CURLINFOEFFECTIVEURL (bsc#1285010).
— SUSE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
suse/curlto a version that resolves this vulnerability.Fixed in 8.0.1-11.134.1 - Upgrade
Upgrade
suse/curl-debuginfoto a version that resolves this vulnerability.Fixed in 8.0.1-11.134.1 - Upgrade
Upgrade
suse/libcurl4-debuginfoto a version that resolves this vulnerability.Fixed in 8.0.1-11.134.1 - Upgrade
Upgrade
suse/libcurl4to a version that resolves this vulnerability.Fixed in 8.0.1-11.134.1 - Upgrade
Upgrade
suse/curl-debugsourceto a version that resolves this vulnerability.Fixed in 8.0.1-11.134.1 - Upgrade
Upgrade
suse/libcurl-develto a version that resolves this vulnerability.Fixed in 8.0.1-11.134.1 - Upgrade
Upgrade
suse/libcurl4to a version that resolves this vulnerability.Fixed in 32bit-8.0.1-11.134.1 - Upgrade
Upgrade
suse/libcurl4-debuginfoto a version that resolves this vulnerability.Fixed in 32bit-8.0.1-11.134.1 - Upgrade
Upgrade
curlto a version that resolves this vulnerability.Patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-5071 - Upgrade
Upgrade
curlto a version that resolves this vulnerability.Patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-5071
Event History
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
Which systems and packages are in scope for this update?
The advisory applies to curl and related libcurl packages on SUSE Linux Enterprise Server 12 SP5 LTSS for aarch64, ppc64le, s390x, and x86_64. Listed packages include curl, libcurl4, libcurl-devel, and their debug and debuginfo packages.
Which curl usage patterns should be prioritized for remediation?
Prioritize workloads that reuse connections with mTLS, Negotiate, or Digest authentication; use HTTP proxies; follow redirects; or connect through SSH, SFTP, SCP, FTP, TFTP, or IMAP. The fixed issues include authentication and credential leakage, host-verification bypasses, command injection, and memory-safety problems in these paths.
What credential exposure is addressed by this update?
The update addresses cross-origin Digest authentication state leakage, Negotiate ambient-user connection reuse, host credentials sent to an HTTP proxy, stale SigV4 headers being sent unintentionally, and passwords exposed through CURLINFO_EFFECTIVE_URL. Environments using these authentication methods or inspecting effective URLs should treat the update as a priority.
Are redirects relevant to the host-verification issues?
Yes. One listed issue allows a redirect to SFTP or SCP to bypass host verification. Another issue involves a protocol-default setting that skips SSH verification.