Red Hat Security Advisory: Red Hat OpenStack Platform 17.1 (etcd) security update

Fixed packages 3

Vulnerabilities 11

• 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
• Critical 9.1
  CVE-2026-33186 Public exploit

  gRPC-Go has an authorization bypass via missing leading slash in :path

  gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input validation of the HTTP/2 `:path` pseudo-header. The gRPC-Go server was too lenient in its routing logic, accepting requests …

  grpc grpc-go zot kubescape Debian Ubuntu Alpine Wolfi Go
  Mar 20, 2026
• High 8.8
  CVE-2026-33413

  etcd: Authorization bypasses in multiple APIs

  etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.4.42, 3.5.28, and 3.6.9, unauthorized users may bypass authentication or authorization checks and call certain etcd functions in clusters that expose the gRPC API …

  etcd-io etcd juicefs-1.3 etcd Debian Ubuntu Azure Linux Alpine Wolfi Go
  Mar 26, 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
• High 7.5
  CVE-2026-25679

  Incorrect parsing of IPv6 host literals in net/url

  url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.

  Go standard library net/url langfuse-3-worker katib-suggestion-hyperopt Debian Ubuntu Azure Linux Alpine Wolfi Go
  Mar 6, 2026
• High 7.5
  CVE-2026-27137

  Incorrect enforcement of email constraints in crypto/x509

  When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be…

  Go standard library crypto/x509 golang go Debian Ubuntu Azure Linux Alpine Wolfi Go
  Mar 6, 2026
• High 7.5
  CVE-2026-32280

  Unexpected work during chain building in crypto/x509

  During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 an…

  Go standard library crypto/x509 golang go Debian Ubuntu Azure Linux Alpine Wolfi Go
  Apr 8, 2026
• High 7.5
  CVE-2026-32283

  Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls

  If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.

  Go standard library crypto/tls golang go Debian Ubuntu Azure Linux Alpine Wolfi Go
  Apr 8, 2026
• High 7.5
  CVE-2026-33810

  Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509

  When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issu…

  Go standard library crypto/x509 golang go Debian Ubuntu Azure Linux Alpine Wolfi Go
  Apr 8, 2026
• Medium 6.4
  CVE-2026-32282

  TOCTOU permits root escape on Linux via Root.Chmod in os in internal/syscall/unix

  On Linux, if the target of Root.Chmod is replaced with a symlink while the chmod operation is in progress, Chmod can operate on the target of the symlink, even when the target lies outside the root. The Linux fchmodat syscall silently ignores the AT_SYMLINK_N…

  Go standard library internal/syscall/unix golang go Debian Ubuntu Azure Linux Alpine Wolfi Go
  Apr 8, 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=2434432
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2437111
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2445356
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2449833
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2451728
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2456336
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2456338
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2456339
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_28047.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-2025-61729
• 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
• report
  https://access.redhat.com/security/cve/CVE-2026-25679
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-25679
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-25679
• article
  https://go.dev/cl/752180
• article
  https://go.dev/issue/77578
• article
  https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk
• advisory
  https://pkg.go.dev/vuln/GO-2026-4601