Red Hat Security Advisory: grafana security update

Fixed packages 4

Vulnerabilities 5

• High 7.5
  CVE-2026-78667

  Lack of limit on size of parsed Range headers in net/http

  When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU.

  Go standard library net/http golang go Debian Ubuntu Azure Linux Alpine Wolfi Go
  Oct 8, 2026
• High 7.5
  CVE-2026-78669

  Excessive CPU consumption from repeated initial window changes in net/http

  A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values.

  Go standard library golang.org/x/net net/http golang.org/x/net/http2 Debian Ubuntu Azure Linux Alpine Wolfi Go
  Oct 8, 2026
• High 7.5
  CVE-2026-97031

  Reject malformed ECH outer extension references in crypto/tls

  Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject these as malformed and …

  Go standard library crypto/tls golang go Debian Ubuntu Azure Linux Alpine Wolfi Go
  Oct 8, 2026
• High 7.1
  CVE-2026-17183

  CVE-2026-17183 CVE Record

  An authenticated user with permission to create or edit alert rules can bypass datasource query authorization by marking an alert rule query as a server-side expression while referencing a real datasource UID (incorrect authorization). This can expose data ac…

  Grafana Grafana OSS Grafana Enterprise grafana Web / CMS Ubuntu Alpine
  Aug 19, 2026
• Medium 6.8
  CVE-2026-111943 Public exploit

  Distrust compromised intermediate certificates in crypto/x509

  On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in cr…

  Go standard library crypto/x509 golang go Debian Ubuntu Azure Linux Alpine Wolfi Go crates.io
  Oct 21, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2519801
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2548334
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2548336
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2548344
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2556068
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_89744.json
• report
  https://access.redhat.com/security/cve/CVE-2026-17183
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-17183
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-17183
• article
  https://grafana.com/security/security-advisories/cve-2026-17183
• report
  https://access.redhat.com/security/cve/CVE-2026-78667
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-78667
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-78667
• article
  https://go.dev/cl/847309
• article
  https://go.dev/issue/81858
• article
  https://groups.google.com/g/golang-announce/c/U2fTuyDJznI
• advisory
  https://pkg.go.dev/vuln/GO-2026-6609
• report
  https://access.redhat.com/security/cve/CVE-2026-78669
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-78669
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-78669
• article
  https://go.dev/cl/847186
• article
  https://go.dev/cl/847308
• article
  https://go.dev/issue/81742
• article
  https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs
• advisory
  https://pkg.go.dev/vuln/GO-2026-6611
• report
  https://access.redhat.com/security/cve/CVE-2026-97031
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-97031
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-97031
• article
  https://go.dev/cl/847312
• article
  https://go.dev/issue/81855
• advisory
  https://pkg.go.dev/vuln/GO-2026-6607
• report
  https://access.redhat.com/security/cve/CVE-2026-111943
• article
  https://access.redhat.com/security/vulnerabilities/RHSB-2026-012
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-111943
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-111943
• article
  https://github.com/golang/go/issues/82345
• article
  https://groups.google.com/g/golang-nuts/c/K22sG2AYnKU
• advisory
  https://pkg.go.dev/vuln/GO-2026-6809