RHSA-2026:6016

Vulnerability from csaf_redhat - Published: 2026-03-30 01:12 - Updated: 2026-04-23 20:09
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: python3.11: * python3.11-3.11.15-2.hum1 (aarch64, x86_64) * python3.11-debug-3.11.15-2.hum1 (aarch64, x86_64) * python3.11-devel-3.11.15-2.hum1 (aarch64, x86_64) * python3.11-idle-3.11.15-2.hum1 (aarch64, x86_64) * python3.11-libs-3.11.15-2.hum1 (aarch64, x86_64) * python3.11-test-3.11.15-2.hum1 (aarch64, x86_64) * python3.11-tkinter-3.11.15-2.hum1 (aarch64, x86_64) * python3.11-3.11.15-2.hum1.src (source)
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-2026-4519

A flaw was found in Python. The `webbrowser.open()` API, used to launch web browsers, does not properly sanitize input. This allows a remote attacker to craft a malicious URL containing leading dashes. When such a URL is opened, certain web browsers may interpret these dashes as command-line options, which could lead to unexpected behavior, information disclosure, or potentially arbitrary code execution, impacting the integrity of the system.

7.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:6016
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.
References
To clipboard 

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        "name": "Improper Neutralization of Argument Delimiters in a Command (\u0027Argument Injection\u0027)"
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          "title": "Vulnerability description"
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L",
            "version": "3.1"
          },
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            "Red Hat Hardened Images:python3-11-main@src",
            "Red Hat Hardened Images:python3-11-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "python: Python: Command-line option injection in webbrowser.open() via crafted URLs"
    }
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}


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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

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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.



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