Red Hat Security Advisory: osbuild-composer security update

Fixed packages 7

Vulnerabilities 4

• Critical 9.1
  CVE-2025-68121

  Unexpected session resumption in crypto/tls

  During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user ca…

  Go standard library crypto/tls langfuse-3-worker katib-suggestion-hyperopt Debian Ubuntu Azure Linux Alpine Wolfi Go
  Feb 5, 2026
• High 7.5
  CVE-2025-61726

  Memory exhaustion in query parameter parsing in net/url

  The net/url package does not set a limit on the number of query parameters in a query. While the maximum size of query parameters in URLs is generally limited by the maximum request header size, the net/http.Request.ParseForm method can parse large URL-encode…

  Go standard library net/url katib-suggestion-hyperopt katib-earlystopping Debian Ubuntu Azure Linux Alpine Wolfi Go
  Jan 28, 2026
• High 7.5
  CVE-2025-61729

  Excessive resource consumption when printing error string for host certificate validation in crypto/x509

  Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certi…

  Go standard library crypto/x509 katib-suggestion-hyperopt katib-earlystopping Debian Ubuntu Azure Linux Alpine Wolfi Go
  Dec 2, 2025
• Medium 6.5
  CVE-2025-61728

  Excessive CPU consumption when building archive index in archive/zip

  archive/zip uses a super-linear file name indexing algorithm that is invoked the first time a file in an archive is opened. This can lead to a denial of service when consuming a maliciously constructed ZIP archive.

  Go standard library archive/zip katib-suggestion-hyperopt katib-earlystopping Debian Ubuntu Azure Linux Alpine Wolfi Go
  Jan 28, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2418462
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2434431
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2434432
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2437111
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_3752.json
• report
  https://access.redhat.com/security/cve/CVE-2025-61726
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-61726
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-61726
• article
  https://go.dev/cl/736712
• article
  https://go.dev/issue/77101
• article
  https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc
• advisory
  https://pkg.go.dev/vuln/GO-2026-4341
• report
  https://access.redhat.com/security/cve/CVE-2025-61728
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-61728
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-61728
• article
  https://go.dev/cl/736713
• article
  https://go.dev/issue/77102
• advisory
  https://pkg.go.dev/vuln/GO-2026-4342
• report
  https://access.redhat.com/security/cve/CVE-2025-61729
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-61729
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-61729
• article
  https://go.dev/cl/725920
• article
  https://go.dev/issue/76445
• article
  https://groups.google.com/g/golang-announce/c/8FJoBkPddm4
• advisory
  https://pkg.go.dev/vuln/GO-2025-4155
• report
  https://access.redhat.com/security/cve/CVE-2025-68121
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-68121
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-68121
• article
  https://go.dev/cl/737700
• article
  https://go.dev/issue/77217
• article
  https://groups.google.com/g/golang-announce/c/K09ubi9FQFk
• advisory
  https://pkg.go.dev/vuln/GO-2026-4337