Skip to content
OpenAdvisories
High RHSA-2026:99643 1 CVE

Red Hat Security Advisory: curl security update

Published Nov 13, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 8

ReleasePackageFixed in
Red Hat · RHEL 10.2 EUS enterprise_linux_eus:10.2 curl 0:8.12.1-4.el10_2.9
Red Hat · RHEL 10.2 EUS enterprise_linux_eus:10.2 curl-debuginfo 0:8.12.1-4.el10_2.9
Red Hat · RHEL 10.2 EUS enterprise_linux_eus:10.2 curl-debugsource 0:8.12.1-4.el10_2.9
Red Hat · RHEL 10.2 EUS enterprise_linux_eus:10.2 libcurl 0:8.12.1-4.el10_2.9
Red Hat · RHEL 10.2 EUS enterprise_linux_eus:10.2 libcurl-debuginfo 0:8.12.1-4.el10_2.9
Red Hat · RHEL 10.2 EUS enterprise_linux_eus:10.2 libcurl-devel 0:8.12.1-4.el10_2.9
Red Hat · RHEL 10.2 EUS enterprise_linux_eus:10.2 libcurl-minimal 0:8.12.1-4.el10_2.9
Red Hat · RHEL 10.2 EUS enterprise_linux_eus:10.2 libcurl-minimal-debuginfo 0:8.12.1-4.el10_2.9

Vulnerabilities 1

  • High 7.5
    CVE-2026-6276

    stale custom cookie host causes cookie leak

    Using libcurl, when a custom `Host:` header is first set for an HTTP request and a second request is subsequently done using the same *easy handle* but without the custom `Host:` header set, the second request would use stale information and pass on cookies m…

    curl curl curl curl Debian Ubuntu Azure Linux Alpine

References

  • article
    https://access.redhat.com/security/updates/classification/#low
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2461203
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_99643.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-6276
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-6276
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-6276
  • article
    https://curl.se/docs/CVE-2026-6276.html