RHSA-2026:34119

Vulnerability from csaf_redhat - Published: 2026-07-01 09:00 - Updated: 2026-07-15 15:31
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: python-rpds-py: * python3-rpds-py-2026.6.3-1.hum1 (aarch64, x86_64) * python-rpds-py-2026.6.3-1.hum1.src (src)
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-2026-45409

A flaw was found in the idna library, which handles Internationalized Domain Names in Python applications. A remote attacker could exploit this vulnerability by sending specially crafted, excessively long inputs to the library's encoding function. This could cause the system to consume significant resources, leading to a Denial of Service (DoS), where the affected application becomes unavailable to legitimate users. This issue stems from an incomplete fix for a previously identified vulnerability.

5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-770 - Allocation of Resources Without Limits or Throttling
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:python-rpds-py-main@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:python-rpds-py-main@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:python-rpds-py-main@x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Moderate
CVE-2026-49476

A flaw was found in soupsieve, a CSS selector library used with Beautiful Soup 4. This vulnerability allows a remote attacker to cause a denial of service (DoS) by supplying a specially crafted CSS selector string. The parser allocates unbounded memory when compiling large, comma-separated selector lists, leading to excessive memory consumption and system instability.

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
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:python-rpds-py-main@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:python-rpds-py-main@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:python-rpds-py-main@x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-49477

A flaw was found in soupsieve, a CSS selector library. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by supplying specially crafted, untrusted CSS selector strings. The flaw occurs due to a regular expression vulnerable to catastrophic backtracking when processing an attribute selector with an unterminated quoted value, leading to CPU exhaustion.

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
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:python-rpds-py-main@aarch64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:python-rpds-py-main@src —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:python-rpds-py-main@x86_64 —
Vendor Fix fix
Threats
Impact Important
References
To clipboard 

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        "name": "Allocation of Resources Without Limits or Throttling"
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      "discovery_date": "2026-06-05T23:01:44.292958+00:00",
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          "text": "A flaw was found in the idna library, which handles Internationalized Domain Names in Python applications. A remote attacker could exploit this vulnerability by sending specially crafted, excessively long inputs to the library\u0027s encoding function. This could cause the system to consume significant resources, leading to a Denial of Service (DoS), where the affected application becomes unavailable to legitimate users. This issue stems from an incomplete fix for a previously identified vulnerability.",
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          "text": "python-idna: idna: Denial of Service via specially crafted long inputs",
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          "text": "A flaw was found in the python-idna library. This is an incomplete fix for CVE-2024-3651. The idna.encode() function performs contextual validation checks (valid_contexto) before rejecting oversized inputs, allowing specially crafted long payloads to cause excessive CPU consumption and lead to a denial of service. The fix in version 3.14 rejects long inputs early before further processing, and version 3.15 extends this approach to alternate per-label conversion and codec functions.",
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          "details": "To mitigate this denial-of-service vulnerability, applications utilizing the `idna` Python library should implement input validation to ensure that domain names do not exceed the standard 253-character length limit before being passed to the `idna.encode()` function. This operational control prevents the processing of excessively long inputs that could lead to resource exhaustion and service unavailability.\n\nApplications that pass user-controlled data directly to `idna.encode()` without validation checks (e.g.: DNS length \u003c 254 chars) are affected.",
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          "text": "2500715"
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          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
        },
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          "category": "other",
          "text": "An uncontrolled resource consumption vulnerability was found in the soupsieve Python package, a CSS selector library used by BeautifulSoup4. A remote attacker could provide a crafted CSS selector string that causes excessive memory or CPU consumption, leading to a denial of service condition. Red Hat ships soupsieve as a dependency in multiple products including OpenShift, Ceph Storage, RHOAI, Satellite, Ansible Automation Platform, OpenStack Platform, CNV, Lightspeed, and various container images.",
          "title": "Statement"
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            "attackVector": "NETWORK",
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            "baseScore": 7.5,
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            "version": "3.1"
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      "threats": [
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          "category": "impact",
          "details": "Important"
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      "title": "soupsieve: python-soupsieve: Soupsieve: Denial of Service via crafted CSS selector string"
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    {
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      "cwe": {
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      },
      "discovery_date": "2026-07-14T22:04:22.677547+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2500752"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in soupsieve, a CSS selector library. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by supplying specially crafted, untrusted CSS selector strings. The flaw occurs due to a regular expression vulnerable to catastrophic backtracking when processing an attribute selector with an unterminated quoted value, leading to CPU exhaustion.",
          "title": "Vulnerability description"
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          "text": "soupsieve: Soupsieve: Denial of Service via crafted CSS selector strings",
          "title": "Vulnerability summary"
        },
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          "category": "other",
          "text": "Important: A regular expression denial of service (ReDoS) flaw in the soupsieve library can lead to CPU exhaustion. A remote attacker can exploit this by supplying a small, specially crafted CSS selector string to applications that process untrusted CSS, potentially blocking worker threads and causing a complete service denial in affected Red Hat products.",
          "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"
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        "fixed": [
          "Red Hat Hardened Images:python-rpds-py-main@aarch64",
          "Red Hat Hardened Images:python-rpds-py-main@src",
          "Red Hat Hardened Images:python-rpds-py-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-49477"
        },
        {
          "category": "external",
          "summary": "RHBZ#2500752",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2500752"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-49477",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-49477"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-49477",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49477"
        },
        {
          "category": "external",
          "summary": "https://github.com/facelessuser/soupsieve/commit/eb4397618709186c109400448c6043b728217dc3",
          "url": "https://github.com/facelessuser/soupsieve/commit/eb4397618709186c109400448c6043b728217dc3"
        },
        {
          "category": "external",
          "summary": "https://github.com/facelessuser/soupsieve/releases/tag/2.8.4",
          "url": "https://github.com/facelessuser/soupsieve/releases/tag/2.8.4"
        },
        {
          "category": "external",
          "summary": "https://github.com/facelessuser/soupsieve/security/advisories/GHSA-836r-79rf-4m37",
          "url": "https://github.com/facelessuser/soupsieve/security/advisories/GHSA-836r-79rf-4m37"
        }
      ],
      "release_date": "2026-07-14T20:51:29.369000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-01T09:00:32+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:python-rpds-py-main@aarch64",
            "Red Hat Hardened Images:python-rpds-py-main@src",
            "Red Hat Hardened Images:python-rpds-py-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:34119"
        }
      ],
      "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:python-rpds-py-main@aarch64",
            "Red Hat Hardened Images:python-rpds-py-main@src",
            "Red Hat Hardened Images:python-rpds-py-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "soupsieve: Soupsieve: Denial of Service via crafted CSS selector strings"
    }
  ]
}



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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.