RHSA-2026:11803

Vulnerability from csaf_redhat - Published: 2026-04-29 15:35 - Updated: 2026-05-02 03:25
Summary
Red Hat Security Advisory: VolSync v0.15 security fixes and container updates
Severity
Important
Notes
Topic: VolSync v0.15 General Availability release images, which provide enhancements, security fixes, and updated container images. 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 links in the References section.
Details: VolSync v0.15 is a Kubernetes operator that enables asynchronous replication of persistent volumes within a cluster, or across clusters. After deploying the VolSync operator, it can create and maintain copies of your persistent data. For more information about VolSync, see: https://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.16/html/business_continuity/business-cont-overview#volsync or the VolSync open source community website at: https://volsync.readthedocs.io/en/stable/.
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-2026-32282

A flaw was found in the internal/syscall/unix package in the Go standard library. If the target of the `Root.Chmod` function is replaced with a symbolic link during execution, specifically after `Root.Chmod` checks the target but before acting, the `chmod` operation will be performed on the file the symbolic link points to. This issue can bypass directory restrictions and lead to unauthorized permission changes on the filesystem.

7.8 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Vendor Fix For more details, see the Red Hat Advanced Cluster Management for Kubernetes documentation: https://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.16/html/business_continuity/business-cont-overview#volsync https://access.redhat.com/errata/RHSA-2026:11803
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.
CVE-2026-33186

A flaw was found in gRPC-Go, the Go language implementation of gRPC. This vulnerability, an authorization bypass, is caused by improper input validation of the HTTP/2 `:path` pseudo-header. A remote attacker can exploit this by sending raw HTTP/2 frames with a malformed `:path` that omits the mandatory leading slash. This allows the attacker to bypass defined security policies, potentially leading to unauthorized access to services or information disclosure.

9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Vendor Fix For more details, see the Red Hat Advanced Cluster Management for Kubernetes documentation: https://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.16/html/business_continuity/business-cont-overview#volsync https://access.redhat.com/errata/RHSA-2026:11803
Workaround To mitigate this issue, implement infrastructure-level normalization to ensure all incoming HTTP/2 `:path` headers are properly formatted with a leading slash before reaching the gRPC-Go server. This can be achieved by configuring a reverse proxy or API gateway to validate and normalize the `:path` header. Ensure that any such intermediary is properly configured and restarted to apply the changes, which may temporarily impact service availability.
References
To clipboard 

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          "text": "A flaw was found in the internal/syscall/unix package in the Go standard library. If the target of the `Root.Chmod` function is replaced with a symbolic link during execution, specifically after `Root.Chmod` checks the target but before acting, the `chmod` operation will be performed on the file the symbolic link points to. This issue can bypass directory restrictions and lead to unauthorized permission changes on the filesystem.",
          "title": "Vulnerability description"
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          "text": "golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this issue, an attacker needs access to the system and the required permissions to create a symbolic link. Additionally, the attacker must swap the target file with a symbolic link in the exact window after the `Root.Chmod` function checks its target but before acting. Due to these conditions, this flaw has been rated with a moderate severity.",
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            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:74d79d9a7f8a625cc84c53329e84b30e8de5ae166614cd9417136f0c3d5664e8_amd64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:ed5cef307a8d15acef1805e358ef28d844858f5e87c4ea891675b3d9321a6314_s390x"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:11803"
        },
        {
          "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 Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-operator-bundle@sha256:16fe25978a2667b08c64fdc291cf49f360f734ec4904888f819cc0a563f39b36_amd64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:035aff4df7d0f68580d1592dc48b44af82df171b12de09b5bb7df9842877edcb_arm64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:0a771130ae9933c3458a1f2630b755d039cabac0bd8ff3613080a17b57bbc62e_ppc64le",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:74d79d9a7f8a625cc84c53329e84b30e8de5ae166614cd9417136f0c3d5664e8_amd64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:ed5cef307a8d15acef1805e358ef28d844858f5e87c4ea891675b3d9321a6314_s390x"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-operator-bundle@sha256:16fe25978a2667b08c64fdc291cf49f360f734ec4904888f819cc0a563f39b36_amd64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:035aff4df7d0f68580d1592dc48b44af82df171b12de09b5bb7df9842877edcb_arm64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:0a771130ae9933c3458a1f2630b755d039cabac0bd8ff3613080a17b57bbc62e_ppc64le",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:74d79d9a7f8a625cc84c53329e84b30e8de5ae166614cd9417136f0c3d5664e8_amd64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:ed5cef307a8d15acef1805e358ef28d844858f5e87c4ea891675b3d9321a6314_s390x"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root"
    },
    {
      "cve": "CVE-2026-33186",
      "cwe": {
        "id": "CWE-551",
        "name": "Incorrect Behavior Order: Authorization Before Parsing and Canonicalization"
      },
      "discovery_date": "2026-03-20T23:02:27.802640+00:00",
      "flags": [
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-operator-bundle@sha256:16fe25978a2667b08c64fdc291cf49f360f734ec4904888f819cc0a563f39b36_amd64"
          ]
        }
      ],
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2449833"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in gRPC-Go, the Go language implementation of gRPC. This vulnerability, an authorization bypass, is caused by improper input validation of the HTTP/2 `:path` pseudo-header. A remote attacker can exploit this by sending raw HTTP/2 frames with a malformed `:path` that omits the mandatory leading slash. This allows the attacker to bypass defined security policies, potentially leading to unauthorized access to services or information disclosure.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation",
          "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 Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:035aff4df7d0f68580d1592dc48b44af82df171b12de09b5bb7df9842877edcb_arm64",
          "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:0a771130ae9933c3458a1f2630b755d039cabac0bd8ff3613080a17b57bbc62e_ppc64le",
          "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:74d79d9a7f8a625cc84c53329e84b30e8de5ae166614cd9417136f0c3d5664e8_amd64",
          "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:ed5cef307a8d15acef1805e358ef28d844858f5e87c4ea891675b3d9321a6314_s390x"
        ],
        "known_not_affected": [
          "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-operator-bundle@sha256:16fe25978a2667b08c64fdc291cf49f360f734ec4904888f819cc0a563f39b36_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-33186"
        },
        {
          "category": "external",
          "summary": "RHBZ#2449833",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2449833"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-33186",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-33186"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-33186",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33186"
        },
        {
          "category": "external",
          "summary": "https://github.com/grpc/grpc-go/security/advisories/GHSA-p77j-4mvh-x3m3",
          "url": "https://github.com/grpc/grpc-go/security/advisories/GHSA-p77j-4mvh-x3m3"
        }
      ],
      "release_date": "2026-03-20T22:23:32.147000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-04-29T15:35:02+00:00",
          "details": "For more details, see the Red Hat Advanced Cluster Management for Kubernetes documentation:\n\nhttps://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.16/html/business_continuity/business-cont-overview#volsync",
          "product_ids": [
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:035aff4df7d0f68580d1592dc48b44af82df171b12de09b5bb7df9842877edcb_arm64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:0a771130ae9933c3458a1f2630b755d039cabac0bd8ff3613080a17b57bbc62e_ppc64le",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:74d79d9a7f8a625cc84c53329e84b30e8de5ae166614cd9417136f0c3d5664e8_amd64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:ed5cef307a8d15acef1805e358ef28d844858f5e87c4ea891675b3d9321a6314_s390x"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:11803"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, implement infrastructure-level normalization to ensure all incoming HTTP/2 `:path` headers are properly formatted with a leading slash before reaching the gRPC-Go server. This can be achieved by configuring a reverse proxy or API gateway to validate and normalize the `:path` header. Ensure that any such intermediary is properly configured and restarted to apply the changes, which may temporarily impact service availability.",
          "product_ids": [
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-operator-bundle@sha256:16fe25978a2667b08c64fdc291cf49f360f734ec4904888f819cc0a563f39b36_amd64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:035aff4df7d0f68580d1592dc48b44af82df171b12de09b5bb7df9842877edcb_arm64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:0a771130ae9933c3458a1f2630b755d039cabac0bd8ff3613080a17b57bbc62e_ppc64le",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:74d79d9a7f8a625cc84c53329e84b30e8de5ae166614cd9417136f0c3d5664e8_amd64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:ed5cef307a8d15acef1805e358ef28d844858f5e87c4ea891675b3d9321a6314_s390x"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-operator-bundle@sha256:16fe25978a2667b08c64fdc291cf49f360f734ec4904888f819cc0a563f39b36_amd64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:035aff4df7d0f68580d1592dc48b44af82df171b12de09b5bb7df9842877edcb_arm64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:0a771130ae9933c3458a1f2630b755d039cabac0bd8ff3613080a17b57bbc62e_ppc64le",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:74d79d9a7f8a625cc84c53329e84b30e8de5ae166614cd9417136f0c3d5664e8_amd64",
            "Red Hat Advanced Cluster Management for Kubernetes 2.16:registry.redhat.io/rhacm2/volsync-rhel9@sha256:ed5cef307a8d15acef1805e358ef28d844858f5e87c4ea891675b3d9321a6314_s390x"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation"
    }
  ]
}


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Tags
Taxonomy of the tags.




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.



Detection rules are retrieved from Rulezet.