RHSA-2026:84422

Vulnerability from csaf_redhat - Published: 2026-10-17 18:08 - Updated: 2026-11-07 05:52
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: grafana12.4: * grafana12.4-12.4.12-0.5.hum1 (aarch64, x86_64) * grafana12.4-12.4.12-0.5.hum1.src (src) Security Fix(es): grafana12.4: * CVE-2026-109955
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-2026-15577

A flaw was found in Grafana. An improper authorization vulnerability allows an authenticated user or service account with read-only access to modify Git Sync connection configurations through the status subresource. Consequently, an attacker can make unauthorized configuration changes despite lacking administrative or write permissions.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE-425 - Direct Request
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Moderate
CVE-2026-33374

A flaw was found in Grafana. The Prometheus rule conversion API endpoints fail to enforce a limit on request body sizes. An authenticated user can exploit this vulnerability by submitting excessively large requests to trigger unbounded memory allocation, which crashes the server and results in a Denial of Service (DoS).

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-770 - Allocation of Resources Without Limits or Throttling
Affected products
Fixed 3 products, the same list as for CVE-2026-15577
Threats
Impact Moderate
CVE-2026-109955

A flaw was found in Hono. A remote, unauthenticated attacker can exploit a double path decoding issue in the serveStatic component by submitting requests with specially crafted, encoded URL paths. This flaw allows attackers to bypass security middleware, granting unauthorized access to protected static files without undergoing authentication checks.

5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Affected products
Fixed 3 products, the same list as for CVE-2026-15577
Threats
Impact Moderate
References
To clipboard 

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          "text": "A flaw was found in Grafana. An improper authorization vulnerability allows an authenticated user or service account with read-only access to modify Git Sync connection configurations through the status subresource. Consequently, an attacker can make unauthorized configuration changes despite lacking administrative or write permissions.",
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          "details": "Restrict access to the Grafana UI and HTTP API to trusted clients and administrative networks. Limit accounts that can authenticate to Grafana and review roles that can use alerting or Prometheus rule conversion APIs. Apply process or cgroup memory limits to reduce out-of-memory blast radius.",
          "product_ids": [
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            "version": "3.1"
          },
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            "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@x86_64"
          ]
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      ],
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          "details": "Moderate"
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      ],
      "title": "grafana: grafana: Denial of Service via unbounded request body size in Prometheus rule conversion API"
    },
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      "ids": [
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          "text": "A flaw was found in Hono. A remote, unauthenticated attacker can exploit a double path decoding issue in the serveStatic component by submitting requests with specially crafted, encoded URL paths. This flaw allows attackers to bypass security middleware, granting unauthorized access to protected static files without undergoing authentication checks.",
          "title": "Vulnerability description"
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          "text": "hono: hono: Security bypass via double path decoding",
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        {
          "category": "other",
          "text": "A MODERATE severity flaw was found in the Hono web framework, an npm dependency shipped in several Red Hat products, including Red Hat Enterprise Linux and Red Hat In-Vehicle OS (grafana), Red Hat OpenShift Dev Spaces, Red Hat OpenShift AI, Migration Toolkit for Applications, Ansible Automation Platform and Ansible Services (MCP server images), and Red Hat Hardened Images (Hummingbird grafana images). The serveStatic middleware decodes the request path a second time after Hono has already decoded it once for routing. By sending a request with a crafted, malformed percent-encoded path, a remote, unauthenticated attacker can cause the router to match the encoded form of the path while the second decode resolves the real directory, so middleware mounted on a static prefix, such as an authentication check, is skipped and protected static files can be read without authentication. The requested file is still resolved within the configured root, so this is not a path traversal outside it, and applications that serve only public files without prefix middleware are not affected. Red Hat rates this flaw MODERATE with a CVSS 3.1 score of 5.3, consistent with the upstream severity. For most affected Red Hat products, the fix is deferred because no trackers are filed for moderate-impact flaws with a CVSS score below 7.0; the residual risk is unauthenticated disclosure of protected static files. For the Red Hat Hardened Images (Hummingbird) grafana components, the impact is the same and a fix is being pursued by the delegated image maintainers.",
          "title": "Statement"
        },
        {
          "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": {
        "fixed": [
          "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@aarch64",
          "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@src",
          "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-109955"
        },
        {
          "category": "external",
          "summary": "RHBZ#2550544",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550544"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-109955",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-109955"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-109955",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-109955"
        },
        {
          "category": "external",
          "summary": "https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7",
          "url": "https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7"
        },
        {
          "category": "external",
          "summary": "https://www.vulncheck.com/advisories/hono-4.12.4-before-4.13.11-middleware-bypass-via-servestatic-double-decoding",
          "url": "https://www.vulncheck.com/advisories/hono-4.12.4-before-4.13.11-middleware-bypass-via-servestatic-double-decoding"
        }
      ],
      "release_date": "2026-10-13T13:27:19.610000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-17T18:08:49+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@aarch64",
            "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@src",
            "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:84422"
        },
        {
          "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.",
          "product_ids": [
            "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@aarch64",
            "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@src",
            "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@aarch64",
            "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@src",
            "Red Hat Hardened Images:grafana12.4-0:12.4.12-0.5.hum1@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "hono: hono: Security bypass via double path decoding"
    }
  ]
}



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