RHSA-2026:68926

Vulnerability from csaf_redhat - Published: 2026-09-18 16:38 - Updated: 2026-09-23 20:49
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: grafana13.1: * grafana13.1-13.1.6-0.2.hum1 (aarch64, x86_64) * grafana13.1-13.1.6-0.2.hum1.src (src) Security Fix(es): grafana13.1: * CVE-2026-81871
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-2026-14199

On instances using Auth Proxy header authentication ([auth.proxy]) with identity caching enabled (sync_ttl > 0), two distinct user identities could produce the same cache key. An authenticated low-privileged user able to influence their own forwarded identity attributes could be served a higher-privileged user's cached session and act as that user for the duration of the cache TTL. Default configurations are not affected.

7.1 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
CWE-639 - Authorization Bypass Through User-Controlled Key
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-81871

A flaw was found in OpenTelemetry-Go, specifically within its gRPC log exporter. This vulnerability allows a network attacker to bypass the intended private Certificate Authority (CA) pinning and mutual Transport Layer Security (TLS) configurations. The issue arises because the environment-only TLS path incorrectly uses system-trusted certificates instead of the application's configured client certificates. This bypass enables an attacker to intercept and spoof the collector connection, potentially leading to the unauthorized reading or alteration of sensitive log telemetry.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE-295 - Improper Certificate Validation
Affected products
Fixed 3 products, the same list as for CVE-2026-14199
Threats
Impact Moderate
CVE-2026-81872

A flaw was found in the OpenTelemetry-Go `BatchingProcessor` component. A remote attacker can exploit this by sending a high volume of log emissions, which can fill the asynchronous export buffer. This causes the processor to enter a tight CPU loop, repeatedly retrying to export logs without proper waiting mechanisms. The consequence is the exhaustion of CPU resources, leading to a degradation or denial of service (DoS) in the affected application.

5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Affected products
Fixed 3 products, the same list as for CVE-2026-14199
Threats
Impact Moderate
CVE-2026-92599

A flaw was found in joi. A remote attacker can exploit an unanchored regular expression in the `Joi.string().isoDate()` validation rule by supplying a specially crafted string. This input, consisting of a valid ISO date followed by a long sequence of fractional-second digits, causes the regular expression engine to consume excessive processing time. This vulnerability leads to a Regular Expression Denial of Service (ReDoS), allowing the attacker to stall the application with a single request.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1333 - Inefficient Regular Expression Complexity
Affected products
Fixed 3 products, the same list as for CVE-2026-14199
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:68926 self
https://access.redhat.com/security/cve/CVE-2026-81871 external
https://access.redhat.com/security/updates/classi… external
https://images.redhat.com/ external
https://access.redhat.com/security/cve/CVE-2026-81872 external
https://access.redhat.com/security/cve/CVE-2026-14199 external
https://access.redhat.com/security/cve/CVE-2026-92599 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-14199 self
https://bugzilla.redhat.com/show_bug.cgi?id=2521850 external
https://www.cve.org/CVERecord?id=CVE-2026-14199 external
https://nvd.nist.gov/vuln/detail/CVE-2026-14199 external
https://grafana.com/security/security-advisories/… external
https://access.redhat.com/security/cve/CVE-2026-81871 self
https://bugzilla.redhat.com/show_bug.cgi?id=2535725 external
https://www.cve.org/CVERecord?id=CVE-2026-81871 external
https://nvd.nist.gov/vuln/detail/CVE-2026-81871 external
https://github.com/open-telemetry/opentelemetry-g… external
https://github.com/open-telemetry/opentelemetry-g… external
https://github.com/open-telemetry/opentelemetry-g… external
https://access.redhat.com/security/cve/CVE-2026-81872 self
https://bugzilla.redhat.com/show_bug.cgi?id=2535727 external
https://www.cve.org/CVERecord?id=CVE-2026-81872 external
https://nvd.nist.gov/vuln/detail/CVE-2026-81872 external
https://github.com/open-telemetry/opentelemetry-g… external
https://github.com/open-telemetry/opentelemetry-g… external
https://github.com/open-telemetry/opentelemetry-g… external
https://github.com/open-telemetry/opentelemetry-g… external
https://github.com/open-telemetry/opentelemetry-g… external
https://access.redhat.com/security/cve/CVE-2026-92599 self
https://bugzilla.redhat.com/show_bug.cgi?id=2538354 external
https://www.cve.org/CVERecord?id=CVE-2026-92599 external
https://nvd.nist.gov/vuln/detail/CVE-2026-92599 external
https://github.com/hapijs/joi/security/advisories… external
https://www.vulncheck.com/advisories/joi-before-1… external
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          "text": "On instances using Auth Proxy header authentication ([auth.proxy]) with identity caching enabled (sync_ttl \u003e 0), two distinct user identities could produce the same cache key. An authenticated low-privileged user able to influence their own forwarded identity attributes could be served a higher-privileged user\u0027s cached session and act as that user for the duration of the cache TTL. Default configurations are not affected.",
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            "baseScore": 7.1,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
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      "cwe": {
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          "title": "Vulnerability description"
        },
        {
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          "category": "external",
          "summary": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w34q-cm8f-9c5x",
          "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w34q-cm8f-9c5x"
        }
      ],
      "release_date": "2026-09-16T20:43:40.119000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-18T16:38:27+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:grafana13.1-0:13.1.6-0.2.hum1@aarch64",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@src",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:68926"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@aarch64",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@src",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc: OpenTelemetry-Go: TLS certificate bypass allows log telemetry interception and alteration"
    },
    {
      "cve": "CVE-2026-81872",
      "cwe": {
        "id": "CWE-835",
        "name": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)"
      },
      "discovery_date": "2026-09-16T21:01:33.849934+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2535727"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the OpenTelemetry-Go `BatchingProcessor` component. A remote attacker can exploit this by sending a high volume of log emissions, which can fill the asynchronous export buffer. This causes the processor to enter a tight CPU loop, repeatedly retrying to export logs without proper waiting mechanisms. The consequence is the exhaustion of CPU resources, leading to a degradation or denial of service (DoS) in the affected application.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "go.opentelemetry.io/otel/sdk/log: OpenTelemetry-Go: Denial of Service via attacker-driven log emission",
          "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": {
        "fixed": [
          "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@aarch64",
          "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@src",
          "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-81872"
        },
        {
          "category": "external",
          "summary": "RHBZ#2535727",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2535727"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-81872",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-81872"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-81872",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81872"
        },
        {
          "category": "external",
          "summary": "https://github.com/open-telemetry/opentelemetry-go/commit/ba71b09e6ed272e93a669aeaec1e98b1df4cc582",
          "url": "https://github.com/open-telemetry/opentelemetry-go/commit/ba71b09e6ed272e93a669aeaec1e98b1df4cc582"
        },
        {
          "category": "external",
          "summary": "https://github.com/open-telemetry/opentelemetry-go/issues/6797",
          "url": "https://github.com/open-telemetry/opentelemetry-go/issues/6797"
        },
        {
          "category": "external",
          "summary": "https://github.com/open-telemetry/opentelemetry-go/pull/8620",
          "url": "https://github.com/open-telemetry/opentelemetry-go/pull/8620"
        },
        {
          "category": "external",
          "summary": "https://github.com/open-telemetry/opentelemetry-go/releases/tag/sdk/log/v0.21.0",
          "url": "https://github.com/open-telemetry/opentelemetry-go/releases/tag/sdk/log/v0.21.0"
        },
        {
          "category": "external",
          "summary": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-hjf4-fphr-2h65",
          "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-hjf4-fphr-2h65"
        }
      ],
      "release_date": "2026-09-16T20:42:23.507000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-18T16:38:27+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:grafana13.1-0:13.1.6-0.2.hum1@aarch64",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@src",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:68926"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@aarch64",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@src",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "go.opentelemetry.io/otel/sdk/log: OpenTelemetry-Go: Denial of Service via attacker-driven log emission"
    },
    {
      "cve": "CVE-2026-92599",
      "cwe": {
        "id": "CWE-1333",
        "name": "Inefficient Regular Expression Complexity"
      },
      "discovery_date": "2026-09-22T18:14:09.954827+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2538354"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in joi. A remote attacker can exploit an unanchored regular expression in the `Joi.string().isoDate()` validation rule by supplying a specially crafted string. This input, consisting of a valid ISO date followed by a long sequence of fractional-second digits, causes the regular expression engine to consume excessive processing time. This vulnerability leads to a Regular Expression Denial of Service (ReDoS), allowing the attacker to stall the application with a single request.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "joi: joi: Denial of Service via `isoDate` validation regular expression",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service vulnerability as it can be exploited remotely without authentication. An unanchored regular expression in the `isoDate` validation rule of the `joi` library allows an attacker to provide a crafted input, leading to excessive resource consumption and application unresponsiveness. This can significantly impact the availability of services utilizing the vulnerable `joi` versions for ISO date validation.",
          "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:grafana13.1-0:13.1.6-0.2.hum1@aarch64",
          "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@src",
          "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-92599"
        },
        {
          "category": "external",
          "summary": "RHBZ#2538354",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2538354"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-92599",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-92599"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-92599",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-92599"
        },
        {
          "category": "external",
          "summary": "https://github.com/hapijs/joi/security/advisories/GHSA-6h2x-m376-mqjq",
          "url": "https://github.com/hapijs/joi/security/advisories/GHSA-6h2x-m376-mqjq"
        },
        {
          "category": "external",
          "summary": "https://www.vulncheck.com/advisories/joi-before-17.13.7-and-18.2.6-redos-via-isodate",
          "url": "https://www.vulncheck.com/advisories/joi-before-17.13.7-and-18.2.6-redos-via-isodate"
        }
      ],
      "release_date": "2026-09-16T21:47:03.073000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-18T16:38:27+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:grafana13.1-0:13.1.6-0.2.hum1@aarch64",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@src",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:68926"
        },
        {
          "category": "workaround",
          "details": "To mitigate this vulnerability, ensure that any input strings processed by the `Joi.string().isoDate()` validation rule are capped in length before being passed to the \u0027joi\u0027 package. This can prevent the regular expression engine from consuming excessive resources and causing a denial of service.",
          "product_ids": [
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@aarch64",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@src",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@aarch64",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@src",
            "Red Hat Hardened Images:grafana13.1-0:13.1.6-0.2.hum1@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "joi: joi: Denial of Service via `isoDate` validation regular expression"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.