RHSA-2026:2914

Vulnerability from csaf_redhat - Published: 2026-02-18 11:31 - Updated: 2026-04-11 14:08
Summary
Red Hat Security Advisory: grafana security update
Severity
Important
Notes
Topic: An update for grafana is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB. Security Fix(es): * crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729) * grafana/grafana/pkg/services/dashboards: Grafana Dashboard Permissions Scope Bypass Enables Cross?Dashboard Privilege Escalation (CVE-2026-21721) * golang: archive/zip: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728) * golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2025-61726

A flaw was found in the net/url package in the Go standard library. The package does not enforce a limit on the number of unique query parameters it parses. A Go application using the net/http.Request.ParseForm method will try to process all parameters provided in the request. A specially crafted HTTP request containing a massive number of query parameters will cause the application to consume an excessive amount of memory, eventually causing the application to crash or become unresponsive, resulting in a denial of service.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-770 - Allocation of Resources Without Limits or Throttling
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:2914
Workaround Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.
CVE-2025-61728

A flaw was found in the archive/zip package in the Go standard library. A super-linear file name indexing algorithm is used in the first time a file in an archive is opened. A crafted zip archive containing a specific arrangement of file names can cause an excessive CPU and memory consumption. A Go application processing a malicious archive can become unresponsive or crash, resulting in a denial of service.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-770 - Allocation of Resources Without Limits or Throttling
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:2914
Workaround To mitigate this vulnerability, implement a timeout in your archive/zip processing logic to abort the operation if it exceeds a few seconds, preventing the application from consuming an excessive amount of resources.
CVE-2025-61729

A flaw was found in golang. A remote attacker could exploit this vulnerability by providing a specially crafted certificate during the error string construction process within the `HostnameError.Error()` function. This flaw, caused by unbounded string concatenation, leads to excessive resource consumption. Successful exploitation can result in a denial of service (DoS) for the affected system.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1050 - Excessive Platform Resource Consumption within a Loop
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:2914
CVE-2025-68121

A flaw was found in the crypto/tls component. This vulnerability occurs during Transport Layer Security (TLS) session resumption when certificate authority (CA) settings are modified between the initial and resumed handshakes. An attacker could exploit this to bypass certificate validation, allowing a client or server to establish a connection that should have been rejected. This could lead to an authentication bypass under specific conditions.

7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:2914
CVE-2026-21721

An authorization error has been discovered in Grafana dashboards. The dashboard permissions API does not verify the target dashboard scope and only checks the dashboards.permissions:* action. As a result, a user who has permission management rights on one dashboard can read and modify permissions on other dashboards. This is an organization‑internal privilege escalation.

8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE-639 - Authorization Bypass Through User-Controlled Key
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:2914
Workaround Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
References
https://access.redhat.com/errata/RHSA-2026:2914 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=2418462 external
https://bugzilla.redhat.com/show_bug.cgi?id=2433242 external
https://bugzilla.redhat.com/show_bug.cgi?id=2434431 external
https://bugzilla.redhat.com/show_bug.cgi?id=2434432 external
https://bugzilla.redhat.com/show_bug.cgi?id=2437111 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2025-61726 self
https://bugzilla.redhat.com/show_bug.cgi?id=2434432 external
https://www.cve.org/CVERecord?id=CVE-2025-61726 external
https://nvd.nist.gov/vuln/detail/CVE-2025-61726 external
https://go.dev/cl/736712 external
https://go.dev/issue/77101 external
https://groups.google.com/g/golang-announce/c/Vd2… external
https://pkg.go.dev/vuln/GO-2026-4341 external
https://access.redhat.com/security/cve/CVE-2025-61728 self
https://bugzilla.redhat.com/show_bug.cgi?id=2434431 external
https://www.cve.org/CVERecord?id=CVE-2025-61728 external
https://nvd.nist.gov/vuln/detail/CVE-2025-61728 external
https://go.dev/cl/736713 external
https://go.dev/issue/77102 external
https://pkg.go.dev/vuln/GO-2026-4342 external
https://access.redhat.com/security/cve/CVE-2025-61729 self
https://bugzilla.redhat.com/show_bug.cgi?id=2418462 external
https://www.cve.org/CVERecord?id=CVE-2025-61729 external
https://nvd.nist.gov/vuln/detail/CVE-2025-61729 external
https://go.dev/cl/725920 external
https://go.dev/issue/76445 external
https://groups.google.com/g/golang-announce/c/8FJ… external
https://pkg.go.dev/vuln/GO-2025-4155 external
https://access.redhat.com/security/cve/CVE-2025-68121 self
https://bugzilla.redhat.com/show_bug.cgi?id=2437111 external
https://www.cve.org/CVERecord?id=CVE-2025-68121 external
https://nvd.nist.gov/vuln/detail/CVE-2025-68121 external
https://go.dev/cl/737700 external
https://go.dev/issue/77217 external
https://groups.google.com/g/golang-announce/c/K09… external
https://pkg.go.dev/vuln/GO-2026-4337 external
https://access.redhat.com/security/cve/CVE-2026-21721 self
https://bugzilla.redhat.com/show_bug.cgi?id=2433242 external
https://www.cve.org/CVERecord?id=CVE-2026-21721 external
https://nvd.nist.gov/vuln/detail/CVE-2026-21721 external
https://grafana.com/security/security-advisories/… external
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          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-68121",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68121"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/737700",
          "url": "https://go.dev/cl/737700"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/77217",
          "url": "https://go.dev/issue/77217"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/K09ubi9FQFk",
          "url": "https://groups.google.com/g/golang-announce/c/K09ubi9FQFk"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-4337",
          "url": "https://pkg.go.dev/vuln/GO-2026-4337"
        }
      ],
      "release_date": "2026-02-05T17:48:44.141000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-02-18T11:31:17+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:2914"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
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            "AppStream-10.1.Z:grafana-0:10.2.6-22.el10_1.s390x",
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            "AppStream-10.1.Z:grafana-debuginfo-0:10.2.6-22.el10_1.s390x",
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            "AppStream-10.1.Z:grafana-debugsource-0:10.2.6-22.el10_1.aarch64",
            "AppStream-10.1.Z:grafana-debugsource-0:10.2.6-22.el10_1.ppc64le",
            "AppStream-10.1.Z:grafana-debugsource-0:10.2.6-22.el10_1.s390x",
            "AppStream-10.1.Z:grafana-debugsource-0:10.2.6-22.el10_1.x86_64",
            "AppStream-10.1.Z:grafana-selinux-0:10.2.6-22.el10_1.aarch64",
            "AppStream-10.1.Z:grafana-selinux-0:10.2.6-22.el10_1.ppc64le",
            "AppStream-10.1.Z:grafana-selinux-0:10.2.6-22.el10_1.s390x",
            "AppStream-10.1.Z:grafana-selinux-0:10.2.6-22.el10_1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption"
    },
    {
      "cve": "CVE-2026-21721",
      "cwe": {
        "id": "CWE-639",
        "name": "Authorization Bypass Through User-Controlled Key"
      },
      "discovery_date": "2026-01-27T10:02:34.317952+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2433242"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "An authorization error has been discovered in Grafana dashboards. The dashboard permissions API does not verify the target dashboard scope and only checks the dashboards.permissions:* action. As a result, a user who has permission management rights on one dashboard can read and modify permissions on other dashboards. This is an organization\u2011internal privilege escalation.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "grafana/grafana/pkg/services/dashboards: Grafana Dashboard Permissions Scope Bypass Enables Cross\u2011Dashboard Privilege Escalation",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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      },
      "references": [
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-21721"
        },
        {
          "category": "external",
          "summary": "RHBZ#2433242",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433242"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-21721",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-21721"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-21721",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21721"
        },
        {
          "category": "external",
          "summary": "https://grafana.com/security/security-advisories/CVE-2026-21721",
          "url": "https://grafana.com/security/security-advisories/CVE-2026-21721"
        }
      ],
      "release_date": "2026-01-27T09:07:55.160000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-02-18T11:31:17+00:00",
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          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:2914"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
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            "AppStream-10.1.Z:grafana-debugsource-0:10.2.6-22.el10_1.aarch64",
            "AppStream-10.1.Z:grafana-debugsource-0:10.2.6-22.el10_1.ppc64le",
            "AppStream-10.1.Z:grafana-debugsource-0:10.2.6-22.el10_1.s390x",
            "AppStream-10.1.Z:grafana-debugsource-0:10.2.6-22.el10_1.x86_64",
            "AppStream-10.1.Z:grafana-selinux-0:10.2.6-22.el10_1.aarch64",
            "AppStream-10.1.Z:grafana-selinux-0:10.2.6-22.el10_1.ppc64le",
            "AppStream-10.1.Z:grafana-selinux-0:10.2.6-22.el10_1.s390x",
            "AppStream-10.1.Z:grafana-selinux-0:10.2.6-22.el10_1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "grafana/grafana/pkg/services/dashboards: Grafana Dashboard Permissions Scope Bypass Enables Cross\u2011Dashboard Privilege Escalation"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.