WID-SEC-W-2026-0854

Vulnerability from csaf_certbund - Published: 2026-03-24 23:00 - Updated: 2026-05-25 22:00
Summary
Squid: Mehrere Schwachstellen ermöglichen Denial of Service
Severity
Hoch
Notes
Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.
Produktbeschreibung: Squid ist ein Open-Source Web Proxy Cache für Unix und Windows Plattformen. Die Software unterstützt Proxying und Caching von HTTP, FTP und anderen Protokollen, sowie SSL und Access Control Lists.
Angriff: Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Squid ausnutzen, um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Linux - UNIX - Windows
CVE-2026-32748
Affected products
Product Identifier Version Remediation
Open Source Squid <7.5
Open Source / Squid
 <7.5
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
Ubuntu Linux
Ubuntu
 cpe:/o:canonical:ubuntu_linux:- —
Amazon Linux 2
Amazon
 cpe:/o:amazon:linux_2:- —
Oracle Linux
Oracle
 cpe:/o:oracle:linux:- —
RESF Rocky Linux
RESF
 cpe:/o:resf:rocky_linux:- —
CVE-2026-33515
Affected products
Product Identifier Version Remediation
Open Source Squid <7.5
Open Source / Squid
 <7.5
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
Ubuntu Linux
Ubuntu
 cpe:/o:canonical:ubuntu_linux:- —
Amazon Linux 2
Amazon
 cpe:/o:amazon:linux_2:- —
Oracle Linux
Oracle
 cpe:/o:oracle:linux:- —
RESF Rocky Linux
RESF
 cpe:/o:resf:rocky_linux:- —
CVE-2026-33526
Affected products
Product Identifier Version Remediation
Open Source Squid <7.5
Open Source / Squid
 <7.5
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
Ubuntu Linux
Ubuntu
 cpe:/o:canonical:ubuntu_linux:- —
Amazon Linux 2
Amazon
 cpe:/o:amazon:linux_2:- —
Oracle Linux
Oracle
 cpe:/o:oracle:linux:- —
RESF Rocky Linux
RESF
 cpe:/o:resf:rocky_linux:- —
References
URL Category
https://wid.cert-bund.de/.well-known/csaf/white/2… self
https://wid.cert-bund.de/portal/wid/securityadvis… self
https://github.com/squid-cache/squid/security/adv… external
https://github.com/squid-cache/squid/security/adv… external
https://github.com/squid-cache/squid/security/adv… external
https://access.redhat.com/errata/RHSA-2026:6301 external
https://linux.oracle.com/errata/ELSA-2026-6301.html external
https://errata.build.resf.org/RLSA-2026:6301 external
https://ubuntu.com/security/notices/USN-8157-1 external
https://alas.aws.amazon.com/AL2/ALAS2-2026-3242.html external
https://access.redhat.com/errata/RHSA-2026:8119 external
https://errata.build.resf.org/RLSA-2026:8119 external
https://access.redhat.com/errata/RHSA-2026:8317 external
https://errata.build.resf.org/RLSA-2026:8317 external
https://oss.oracle.com/pipermail/el-errata/2026-A… external
https://access.redhat.com/errata/RHSA-2026:8880 external
http://linux.oracle.com/errata/ELSA-2026-8317.html external
https://access.redhat.com/errata/RHSA-2026:9220 external
https://access.redhat.com/errata/RHSA-2026:10256 external
https://access.redhat.com/errata/RHSA-2026:10257 external
https://access.redhat.com/errata/RHSA-2026:10255 external
https://access.redhat.com/errata/RHSA-2026:11901 external
https://linux.oracle.com/errata/ELSA-2026-8880.html external
https://access.redhat.com/errata/RHSA-2026:20564 external
https://access.redhat.com/errata/RHSA-2026:20580 external
https://access.redhat.com/errata/RHSA-2026:20565 external
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Squid ist ein Open-Source Web Proxy Cache f\u00fcr Unix und Windows Plattformen. Die Software unterst\u00fctzt Proxying und Caching von HTTP, FTP und anderen Protokollen, sowie SSL und Access Control Lists.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Squid ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-0854 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0854.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0854 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0854"
      },
      {
        "category": "external",
        "summary": "Squid GitHub vom 2026-03-24",
        "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-hpfx-h48q-gvwg"
      },
      {
        "category": "external",
        "summary": "Squid GitHub vom 2026-03-24",
        "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-f9p7-3jqg-hhvq"
      },
      {
        "category": "external",
        "summary": "Squid GitHub vom 2026-03-24",
        "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-84p4-hcx7-jj7c"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:6301 vom 2026-03-31",
        "url": "https://access.redhat.com/errata/RHSA-2026:6301"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-6301 vom 2026-04-01",
        "url": "https://linux.oracle.com/errata/ELSA-2026-6301.html"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:6301 vom 2026-04-07",
        "url": "https://errata.build.resf.org/RLSA-2026:6301"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8157-1 vom 2026-04-08",
        "url": "https://ubuntu.com/security/notices/USN-8157-1"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS2-2026-3242 vom 2026-04-14",
        "url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3242.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8119 vom 2026-04-14",
        "url": "https://access.redhat.com/errata/RHSA-2026:8119"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:8119 vom 2026-04-15",
        "url": "https://errata.build.resf.org/RLSA-2026:8119"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8317 vom 2026-04-15",
        "url": "https://access.redhat.com/errata/RHSA-2026:8317"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:8317 vom 2026-04-16",
        "url": "https://errata.build.resf.org/RLSA-2026:8317"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-8119 vom 2026-04-16",
        "url": "https://oss.oracle.com/pipermail/el-errata/2026-April/020205.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8880 vom 2026-04-20",
        "url": "https://access.redhat.com/errata/RHSA-2026:8880"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-8317 vom 2026-04-19",
        "url": "http://linux.oracle.com/errata/ELSA-2026-8317.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:9220 vom 2026-04-21",
        "url": "https://access.redhat.com/errata/RHSA-2026:9220"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:10256 vom 2026-04-24",
        "url": "https://access.redhat.com/errata/RHSA-2026:10256"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:10257 vom 2026-04-24",
        "url": "https://access.redhat.com/errata/RHSA-2026:10257"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:10255 vom 2026-04-24",
        "url": "https://access.redhat.com/errata/RHSA-2026:10255"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:11901 vom 2026-04-29",
        "url": "https://access.redhat.com/errata/RHSA-2026:11901"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-8880 vom 2026-05-20",
        "url": "https://linux.oracle.com/errata/ELSA-2026-8880.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:20564 vom 2026-05-26",
        "url": "https://access.redhat.com/errata/RHSA-2026:20564"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:20580 vom 2026-05-26",
        "url": "https://access.redhat.com/errata/RHSA-2026:20580"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:20565 vom 2026-05-26",
        "url": "https://access.redhat.com/errata/RHSA-2026:20565"
      }
    ],
    "source_lang": "en-US",
    "title": "Squid: Mehrere Schwachstellen erm\u00f6glichen Denial of Service",
    "tracking": {
      "current_release_date": "2026-05-25T22:00:00.000+00:00",
      "generator": {
        "date": "2026-05-26T12:15:40.122+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-0854",
      "initial_release_date": "2026-03-24T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-03-24T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-03-25T23:00:00.000+00:00",
          "number": "2",
          "summary": "Referenz(en) aufgenommen: EUVD-2026-16056, EUVD-2026-16068, EUVD-2026-16067"
        },
        {
          "date": "2026-03-31T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Red Hat und Oracle Linux aufgenommen"
        },
        {
          "date": "2026-04-07T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von Rocky Enterprise Software Foundation aufgenommen"
        },
        {
          "date": "2026-04-08T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2026-04-13T22:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2026-04-14T22:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-04-15T22:00:00.000+00:00",
          "number": "8",
          "summary": "Neue Updates von Rocky Enterprise Software Foundation und Red Hat aufgenommen"
        },
        {
          "date": "2026-04-16T22:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2026-04-19T22:00:00.000+00:00",
          "number": "10",
          "summary": "Neue Updates von Red Hat und Oracle Linux aufgenommen"
        },
        {
          "date": "2026-04-20T22:00:00.000+00:00",
          "number": "11",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-04-23T22:00:00.000+00:00",
          "number": "12",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-04-29T22:00:00.000+00:00",
          "number": "13",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-05-19T22:00:00.000+00:00",
          "number": "14",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2026-05-25T22:00:00.000+00:00",
          "number": "15",
          "summary": "Neue Updates von Red Hat aufgenommen"
        }
      ],
      "status": "final",
      "version": "15"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Amazon Linux 2",
            "product": {
              "name": "Amazon Linux 2",
              "product_id": "398363",
              "product_identification_helper": {
                "cpe": "cpe:/o:amazon:linux_2:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Amazon"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c7.5",
                "product": {
                  "name": "Open Source Squid \u003c7.5",
                  "product_id": "T052096"
                }
              },
              {
                "category": "product_version",
                "name": "7.5",
                "product": {
                  "name": "Open Source Squid 7.5",
                  "product_id": "T052096-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:squid-cache:squid:7.5"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Squid"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Oracle Linux",
            "product": {
              "name": "Oracle Linux",
              "product_id": "T004914",
              "product_identification_helper": {
                "cpe": "cpe:/o:oracle:linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Oracle"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "RESF Rocky Linux",
            "product": {
              "name": "RESF Rocky Linux",
              "product_id": "T032255",
              "product_identification_helper": {
                "cpe": "cpe:/o:resf:rocky_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "RESF"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux",
            "product": {
              "name": "Red Hat Enterprise Linux",
              "product_id": "67646",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:enterprise_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Ubuntu Linux",
            "product": {
              "name": "Ubuntu Linux",
              "product_id": "T000126",
              "product_identification_helper": {
                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-32748",
      "product_status": {
        "known_affected": [
          "T052096",
          "67646",
          "T000126",
          "398363",
          "T004914",
          "T032255"
        ]
      },
      "release_date": "2026-03-24T23:00:00.000+00:00",
      "title": "CVE-2026-32748"
    },
    {
      "cve": "CVE-2026-33515",
      "product_status": {
        "known_affected": [
          "T052096",
          "67646",
          "T000126",
          "398363",
          "T004914",
          "T032255"
        ]
      },
      "release_date": "2026-03-24T23:00:00.000+00:00",
      "title": "CVE-2026-33515"
    },
    {
      "cve": "CVE-2026-33526",
      "product_status": {
        "known_affected": [
          "T052096",
          "67646",
          "T000126",
          "398363",
          "T004914",
          "T032255"
        ]
      },
      "release_date": "2026-03-24T23:00:00.000+00:00",
      "title": "CVE-2026-33526"
    }
  ]
}


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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.


Detection rules are retrieved from Rulezet.