RHSA-2026:80858

Vulnerability from csaf_redhat - Published: 2026-10-12 12:03 - Updated: 2026-11-07 13:42
Summary
Red Hat Security Advisory: Red Hat AI Base Images 3.5.3 (Rubin)
Severity
Important
Notes
Topic: Red Hat AI Base Images 3.5.3 (Rubin) is now available.
Details: Red Hat® AI Base Images
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-2026-11940

A flaw was found in the `tarfile.extractall()` function within Python. A remote attacker could exploit this vulnerability by providing a specially crafted archive. This archive could bypass security filters by using a hardlink that references a symlink, allowing the symlink to be recreated outside the intended destination directory. This could lead to out-of-destination file reads or writes, potentially resulting in information disclosure or arbitrary file modification.

7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat OpenShift AI 3.5:registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-15308

A flaw was found in Python. Its incremental HTML parser can be exploited by a remote attacker. By sending specially crafted, uncontrolled data with repeated, incomplete markup declarations, the attacker can cause the system to consume excessive central processing unit (CPU) resources. This leads to a denial of service, making the affected system unresponsive.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-835 - Loop with Unreachable Exit Condition
Affected products
Fixed 1 product, the same list as for CVE-2026-11940
Threats
Impact Important
References
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Red Hat AI Base Images 3.5.3 (Rubin) is now available.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Red Hat\u00ae AI Base Images",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "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.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2026:80858",
        "url": "https://access.redhat.com/errata/RHSA-2026:80858"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-11940",
        "url": "https://access.redhat.com/security/cve/CVE-2026-11940"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-15308",
        "url": "https://access.redhat.com/security/cve/CVE-2026-15308"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/",
        "url": "https://access.redhat.com/security/updates/classification/"
      },
      {
        "category": "external",
        "summary": "https://www.redhat.com/en/products/ai",
        "url": "https://www.redhat.com/en/products/ai"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_80858.json"
      }
    ],
    "title": "Red Hat Security Advisory: Red Hat AI Base Images 3.5.3 (Rubin)",
    "tracking": {
      "current_release_date": "2026-11-07T13:42:36+00:00",
      "generator": {
        "date": "2026-11-07T13:42:36+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "5.4.5"
        }
      },
      "id": "RHSA-2026:80858",
      "initial_release_date": "2026-10-12T12:03:52+00:00",
      "revision_history": [
        {
          "date": "2026-10-12T12:03:52+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-10-12T12:03:56+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2026-11-07T13:42:36+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat OpenShift AI 3.5",
                "product": {
                  "name": "Red Hat OpenShift AI 3.5",
                  "product_id": "Red Hat OpenShift AI 3.5",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:openshift_ai:3.5::el9"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat OpenShift AI"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64",
                "product": {
                  "name": "registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64",
                  "product_id": "registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64",
                  "product_identification_helper": {
                    "purl": "pkg:oci/base-image-rubin-rhel9@sha256%3A934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3?arch=arm64\u0026repository_url=registry.redhat.io/rhai/base-image-rubin-rhel9\u0026tag=1791231915"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "arm64"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64 as a component of Red Hat OpenShift AI 3.5",
          "product_id": "Red Hat OpenShift AI 3.5:registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64"
        },
        "product_reference": "registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64",
        "relates_to_product_reference": "Red Hat OpenShift AI 3.5"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-11940",
      "cwe": {
        "id": "CWE-22",
        "name": "Improper Limitation of a Pathname to a Restricted Directory"
      },
      "discovery_date": "2026-06-23T17:05:33.822236+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2491848"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the `tarfile.extractall()` function within Python. A remote attacker could exploit this vulnerability by providing a specially crafted archive. This archive could bypass security filters by using a hardlink that references a symlink, allowing the symlink to be recreated outside the intended destination directory. This could lead to out-of-destination file reads or writes, potentially resulting in information disclosure or arbitrary file modification.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "python: cpython: CPython: tarfile extraction filter bypass allows escaping the destination directory",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat products that appear in dependency searches under names containing \"tarfile\" but that are not the CPython standard-library tarfile module are not affected by this flaw. Matches such as the Go packages under github.com/containers/image / go.podman.io/image (.../docker/tarfile and .../docker/internal/tarfile) and the Apache Camel artifacts (camel-tarfile, camel-quarkus-tarfile) are unrelated implementations in other languages and do not include the vulnerable CPython tarfile.extractall() filter logic. The separately packaged PyPI component backports-tarfile is also out of scope for this CVE as assigned: it is not the CPython stdlib module named in the advisory and this CVE tracks the interpreter-provided tarfile shipped in Red Hat python3* packages.",
          "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 OpenShift AI 3.5:registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-11940"
        },
        {
          "category": "external",
          "summary": "RHBZ#2491848",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491848"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-11940",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-11940"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-11940",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11940"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/issues/151558",
          "url": "https://github.com/python/cpython/issues/151558"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/pull/151559",
          "url": "https://github.com/python/cpython/pull/151559"
        },
        {
          "category": "external",
          "summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/LD6QIISNQFQYOIEPJNEUIPV7S3V76FZH/",
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/LD6QIISNQFQYOIEPJNEUIPV7S3V76FZH/"
        }
      ],
      "release_date": "2026-06-23T16:04:17.321000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-12T12:03:52+00:00",
          "details": "For more information visit https://access.redhat.com/errata/RHSA-2026:80858",
          "product_ids": [
            "Red Hat OpenShift AI 3.5:registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:80858"
        },
        {
          "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 OpenShift AI 3.5:registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat OpenShift AI 3.5:registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "python: cpython: CPython: tarfile extraction filter bypass allows escaping the destination directory"
    },
    {
      "cve": "CVE-2026-15308",
      "cwe": {
        "id": "CWE-835",
        "name": "Loop with Unreachable Exit Condition"
      },
      "discovery_date": "2026-07-09T18:02:10.090070+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2498608"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Python. Its incremental HTML parser can be exploited by a remote attacker. By sending specially crafted, uncontrolled data with repeated, incomplete markup declarations, the attacker can cause the system to consume excessive central processing unit (CPU) resources. This leads to a denial of service, making the affected system unresponsive.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "python: Python: CPU Denial of Service in HTML parser via repeated unterminated markup declarations",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Important vulnerability in Python\u0027s `html.parser.HTMLParser` can lead to a denial of service. By supplying specially crafted, malformed HTML with repeated unterminated markup declarations, an attacker can cause excessive CPU consumption, rendering the system unresponsive. Red Hat products utilizing this parser to process untrusted HTML content are susceptible to resource exhaustion.",
          "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 OpenShift AI 3.5:registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-15308"
        },
        {
          "category": "external",
          "summary": "RHBZ#2498608",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2498608"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-15308",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-15308"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-15308",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-15308"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/commit/07efb08123ba9367a7107325adb9d5626dca1ca9",
          "url": "https://github.com/python/cpython/commit/07efb08123ba9367a7107325adb9d5626dca1ca9"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/commit/7933f4bf7131aa4140750f9404f5de0aa2969ced",
          "url": "https://github.com/python/cpython/commit/7933f4bf7131aa4140750f9404f5de0aa2969ced"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/commit/bcf98ddbc40ec9b3ee87da0124a5660b19b7e606",
          "url": "https://github.com/python/cpython/commit/bcf98ddbc40ec9b3ee87da0124a5660b19b7e606"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/commit/e9f92ac0b298292e7ff998e52cb8ccacfb27a0bd",
          "url": "https://github.com/python/cpython/commit/e9f92ac0b298292e7ff998e52cb8ccacfb27a0bd"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/issues/153030",
          "url": "https://github.com/python/cpython/issues/153030"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/pull/153031",
          "url": "https://github.com/python/cpython/pull/153031"
        },
        {
          "category": "external",
          "summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/F6453LWKSHKCTWFLCOURWPLETNUIW2Z5/",
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/F6453LWKSHKCTWFLCOURWPLETNUIW2Z5/"
        }
      ],
      "release_date": "2026-07-09T17:10:57.317000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-12T12:03:52+00:00",
          "details": "For more information visit https://access.redhat.com/errata/RHSA-2026:80858",
          "product_ids": [
            "Red Hat OpenShift AI 3.5:registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:80858"
        },
        {
          "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 OpenShift AI 3.5:registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64"
          ]
        }
      ],
      "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 OpenShift AI 3.5:registry.redhat.io/rhai/base-image-rubin-rhel9@sha256:934f3827462a34e41b8ececb59c3c36b333cc5b48329a7b9daf2f8ef2502bcf3_arm64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "python: Python: CPU Denial of Service in HTML parser via repeated unterminated markup declarations"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    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.