Vulnerability-Lookup

WID-SEC-W-2026-1736

Vulnerability from csaf_certbund - Published: 2026-05-28 22:00 - Updated: 2026-06-15 22:00

Summary

7-Zip: Mehrere Schwachstellen

Severity

Mittel

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: 7-Zip ist ein Extraktionsdienstprogramm für Archive, die im ZIP-Format komprimiert sind.

Angriff: Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in 7-Zip ausnutzen, um Speicherinhalte offenzulegen, einen Denial-of-Service auszulösen oder beliebigen Code auszuführen.

Betroffene Betriebssysteme: - Linux - MacOS X - Windows

CVE-2026-48092

Affected products

Known affected 2 products

Product	Identifier	Version	Remediation
Open Source 7-Zip <26.01 Open Source / 7-Zip		<26.01
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

CVE-2026-48101

Affected products

Known affected 2 products

Product	Identifier	Version	Remediation
Open Source 7-Zip <26.01 Open Source / 7-Zip		<26.01
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

CVE-2026-48102

Affected products

Known affected 2 products

Product	Identifier	Version	Remediation
Open Source 7-Zip <26.01 Open Source / 7-Zip		<26.01
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

CVE-2026-48103

Affected products

Known affected 2 products

Product	Identifier	Version	Remediation
Open Source 7-Zip <26.01 Open Source / 7-Zip		<26.01
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

CVE-2026-48104

Affected products

Known affected 2 products

Product	Identifier	Version	Remediation
Open Source 7-Zip <26.01 Open Source / 7-Zip		<26.01
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

CVE-2026-48111

Affected products

Known affected 2 products

Product	Identifier	Version	Remediation
Open Source 7-Zip <26.01 Open Source / 7-Zip		<26.01
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

CVE-2026-48112

Affected products

Known affected 2 products

Product	Identifier	Version	Remediation
Open Source 7-Zip <26.01 Open Source / 7-Zip		<26.01
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

References

7 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://securitylab.github.com/advisories/GHSL-20…	external
https://bodhi.fedoraproject.org/updates/FEDORA-EP…	external
https://bodhi.fedoraproject.org/updates/FEDORA-EP…	external
https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
https://bodhi.fedoraproject.org/updates/FEDORA-20…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "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": "7-Zip ist ein Extraktionsdienstprogramm f\u00fcr Archive, die im ZIP-Format komprimiert sind.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in 7-Zip ausnutzen, um Speicherinhalte offenzulegen, einen Denial-of-Service auszul\u00f6sen oder beliebigen Code auszuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- MacOS X\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-2026-1736 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1736.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1736 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1736"
      },
      {
        "category": "external",
        "summary": "GitHub Security Lab vom 2026-05-22",
        "url": "https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-EPEL-2026-52D18D8D5A vom 2026-06-15",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-52d18d8d5a"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-EPEL-2026-8D909527BA vom 2026-06-15",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-8d909527ba"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-F36864B408 vom 2026-06-15",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-f36864b408"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-4BE7569210 vom 2026-06-15",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-4be7569210"
      }
    ],
    "source_lang": "en-US",
    "title": "7-Zip: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-06-15T22:00:00.000+00:00",
      "generator": {
        "date": "2026-06-16T08:19:58.262+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-1736",
      "initial_release_date": "2026-05-28T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-05-28T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-06-07T22:00:00.000+00:00",
          "number": "2",
          "summary": "CVE erg\u00e4nzt"
        },
        {
          "date": "2026-06-15T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Fedora aufgenommen"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Fedora Linux",
            "product": {
              "name": "Fedora Linux",
              "product_id": "74185",
              "product_identification_helper": {
                "cpe": "cpe:/o:fedoraproject:fedora:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Fedora"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c26.01",
                "product": {
                  "name": "Open Source 7-Zip \u003c26.01",
                  "product_id": "T054729"
                }
              },
              {
                "category": "product_version",
                "name": "26.01",
                "product": {
                  "name": "Open Source 7-Zip 26.01",
                  "product_id": "T054729-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:7-zip:7-zip:26.01"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "7-Zip"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-48092",
      "product_status": {
        "known_affected": [
          "T054729",
          "74185"
        ]
      },
      "release_date": "2026-05-28T22:00:00.000+00:00",
      "title": "CVE-2026-48092"
    },
    {
      "cve": "CVE-2026-48101",
      "product_status": {
        "known_affected": [
          "T054729",
          "74185"
        ]
      },
      "release_date": "2026-05-28T22:00:00.000+00:00",
      "title": "CVE-2026-48101"
    },
    {
      "cve": "CVE-2026-48102",
      "product_status": {
        "known_affected": [
          "T054729",
          "74185"
        ]
      },
      "release_date": "2026-05-28T22:00:00.000+00:00",
      "title": "CVE-2026-48102"
    },
    {
      "cve": "CVE-2026-48103",
      "product_status": {
        "known_affected": [
          "T054729",
          "74185"
        ]
      },
      "release_date": "2026-05-28T22:00:00.000+00:00",
      "title": "CVE-2026-48103"
    },
    {
      "cve": "CVE-2026-48104",
      "product_status": {
        "known_affected": [
          "T054729",
          "74185"
        ]
      },
      "release_date": "2026-05-28T22:00:00.000+00:00",
      "title": "CVE-2026-48104"
    },
    {
      "cve": "CVE-2026-48111",
      "product_status": {
        "known_affected": [
          "T054729",
          "74185"
        ]
      },
      "release_date": "2026-05-28T22:00:00.000+00:00",
      "title": "CVE-2026-48111"
    },
    {
      "cve": "CVE-2026-48112",
      "product_status": {
        "known_affected": [
          "T054729",
          "74185"
        ]
      },
      "release_date": "2026-05-28T22:00:00.000+00:00",
      "title": "CVE-2026-48112"
    }
  ]
}

CVE-2026-48092 (GCVE-0-2026-48092)

Vulnerability from cvelistv5 – Published: 2026-06-05 13:51 – Updated: 2026-06-08 17:08

Title

7-Zip SquashFS Fragment Offset Overflow (GHSL-2026-116)

Summary

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain a heap memory disclosure via SquashFS fragment offset integer overflow on 32-bit builds. 32-bit integer overflow in the SquashFS ReadBlock function allows an attacker-controlled node.Offset value to bypass the fragment bounds check, causing memcpy to read heap memory preceding the cache buffer into the extracted file. The vulnerability is exploitable only on 32-bit builds of 7-Zip where size_t is 32 bits, allowing the addition offsetInBlock + blockSize to wrap modulo 2³². On 64-bit builds the addition is promoted to 64 bits and the check correctly rejects the input. Version 26.01 patches the issue.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M

References

1 reference

URL	Tags
https://securitylab.github.com/advisories/GHSL-20…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
mcmilk	7-Zip	Affected: >= 9.34, < 26.01

Show details on NVD website

JSON

To clipboard

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      {
        "metrics": [
          {
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                "id": "CVE-2026-48092",
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-08T17:08:04.201129Z",
                "version": "2.0.3"
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      }
    ],
    "cna": {
      "affected": [
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          "product": "7-Zip",
          "vendor": "mcmilk",
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain a heap memory disclosure via SquashFS fragment offset integer overflow on 32-bit builds. 32-bit integer overflow in the SquashFS ReadBlock function allows an attacker-controlled node.Offset value to bypass the fragment bounds check, causing memcpy to read heap memory preceding the cache buffer into the extracted file. The vulnerability is exploitable only on 32-bit builds of 7-Zip where size_t is 32 bits, allowing the addition offsetInBlock + blockSize to wrap modulo 2\u00b3\u00b2. On 64-bit builds the addition is promoted to 64 bits and the check correctly rejects the input. Version 26.01 patches the issue."
        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
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          "descriptions": [
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              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-05T13:54:33.596Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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      "references": [
        {
          "name": "https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/",
          "tags": [
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          "url": "https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/"
        }
      ],
      "source": {
        "advisory": "GHSA-fw5r-24vf-c7wq",
        "discovery": "UNKNOWN"
      },
      "title": "7-Zip SquashFS Fragment Offset Overflow (GHSL-2026-116)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
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    "datePublished": "2026-06-05T13:51:55.097Z",
    "dateReserved": "2026-05-20T18:40:45.834Z",
    "dateUpdated": "2026-06-08T17:08:54.213Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-48101 (GCVE-0-2026-48101)

Vulnerability from cvelistv5 – Published: 2026-06-05 15:17 – Updated: 2026-06-05 19:38

Title

GHSL-2026-117: 7-Zip UEFI Capsule uninitialized heap memory disclosure

Summary

7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an An uninitialized memory disclosure vulnerability in the UEFI capsule (.scap) parser in 7-Zip. The OpenCapsule function allocates a heap buffer of attacker-declared CapsuleImageSize (up to 1 GiB) without zero-initialization, then reads the file contents into it with ReadStream_FALSE whose return value is silently discarded. If the file is truncated, the unread tail of the buffer retains uninitialized heap memory, which is then exposed as extracted file content via GetStream. Version 26.0.1 fixes the issue.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

GitHub_M

References

1 reference

URL	Tags
https://securitylab.github.com/advisories/GHSL-20…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
mcmilk	7-Zip	Affected: >= 9.21, < 26.01

Show details on NVD website

JSON

To clipboard

{
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      {
        "metrics": [
          {
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                "id": "CVE-2026-48101",
                "options": [
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                "role": "CISA Coordinator",
                "timestamp": "2026-06-05T19:38:03.046726Z",
                "version": "2.0.3"
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        },
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      }
    ],
    "cna": {
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          "product": "7-Zip",
          "vendor": "mcmilk",
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          "lang": "en",
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
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            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
            "version": "3.1"
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        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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          "name": "https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/",
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          "url": "https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/"
        }
      ],
      "source": {
        "advisory": "GHSA-ch44-3vgx-78cc",
        "discovery": "UNKNOWN"
      },
      "title": "GHSL-2026-117: 7-Zip UEFI Capsule uninitialized heap memory disclosure"
    }
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    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "dateReserved": "2026-05-20T18:40:45.835Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-48102 (GCVE-0-2026-48102)

Vulnerability from cvelistv5 – Published: 2026-06-05 15:19 – Updated: 2026-06-09 14:37

Title

GHSL-2026-118: 7-Zip UDF Field OOB Read

Summary

7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In CFileId::Parse (CPP/7zip/Archive/Udf/UdfIn.cpp), after validating size < 38 + idLen + impLen and advancing processed to 38 + impLen + idLen, the alignment-padding loop reads p[processed] while incrementing up to 3 times to reach a 4-byte boundary, and the processed <= size bounds check only runs after the loop. When (38 + impLen + idLen) % 4 != 0 and 38 + impLen + idLen == size, the loop reads 1 to 3 bytes past the end of the exact-size heap buffer allocated via buf.Alloc((size_t)item.Size). The UDF handler is registered for .iso and .udf files and auto-detected by signature, and the OOB read triggers during Open() when listing or extracting a crafted UDF image. Impact is limited to information disclosure (a 1-bit oracle per OOB byte via open/fail behavior) and denial of service (crash under hardened allocators); there is no write primitive. Version 26.01 fixes the issue.

Severity

3.1 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M

References

1 reference

URL	Tags
https://securitylab.github.com/advisories/GHSL-20…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
mcmilk	7-Zip	Affected: >= 9.11, < 26.01

Show details on NVD website

JSON

To clipboard

{
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      {
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                "id": "CVE-2026-48102",
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    ],
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          "lang": "en",
          "value": "7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler\u0027s File Identifier Descriptor parser. In CFileId::Parse (CPP/7zip/Archive/Udf/UdfIn.cpp), after validating size \u003c 38 + idLen + impLen and advancing processed to 38 + impLen + idLen, the alignment-padding loop reads p[processed] while incrementing up to 3 times to reach a 4-byte boundary, and the processed \u003c= size bounds check only runs after the loop. When (38 + impLen + idLen) % 4 != 0 and 38 + impLen + idLen == size, the loop reads 1 to 3 bytes past the end of the exact-size heap buffer allocated via buf.Alloc((size_t)item.Size). The UDF handler is registered for .iso and .udf files and auto-detected by signature, and the OOB read triggers during Open() when listing or extracting a crafted UDF image. Impact is limited to information disclosure (a 1-bit oracle per OOB byte via open/fail behavior) and denial of service (crash under hardened allocators); there is no write primitive. Version 26.01 fixes the issue."
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        "advisory": "GHSA-455j-xhrg-c54j",
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CVE-2026-48103 (GCVE-0-2026-48103)

Vulnerability from cvelistv5 – Published: 2026-06-05 15:48 – Updated: 2026-06-08 16:07

Title

GHSL-2026-119 7-Zip WIM SecurityId OOB read

Summary

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain an off-by-one heap out-of-bounds read in the WIM (Windows Imaging) archive handler's security descriptor lookup. In CHandler::GetSecurity (CPP/7zip/Archive/Wim/WimHandler.cpp), the per-image SecurOffsets table holds numEntries + 1 cumulative offsets, but the check securityId >= SecurOffsets.Size() admits securityId == numEntries, and the function then reads SecurOffsets[securityId + 1], fetching one UInt32 past the end of the heap-allocated CRecordVector (which performs no bounds checking on operator[]). The securityId is attacker-controlled at offset +0xC of any directory entry in WIM metadata, and the handler is registered for .wim, .swm, .esd, and .ppkg and enabled by default in stock 7z.dll; the OOB triggers zero-click in the GUI because 7zFM.exe's ListView calls GetRawProp(kpidNtSecure) for every item during listing (ASan-confirmed), and is also reachable via CLI listing with 7zz l -slt. Impact is limited to denial of service under hardened allocators and minor information disclosure, since the OOB value is only consumed arithmetically as a length and is not surfaced to the attacker; there is no write primitive.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M

References

1 reference

URL	Tags
https://securitylab.github.com/advisories/GHSL-20…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
mcmilk	7-Zip	Affected: >= 9.34, < 26.01

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
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    ],
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          "vendor": "mcmilk",
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            }
          ]
        }
      ],
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        {
          "lang": "en",
          "value": "7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain an off-by-one heap out-of-bounds read in the WIM (Windows Imaging) archive handler\u0027s security descriptor lookup. In CHandler::GetSecurity (CPP/7zip/Archive/Wim/WimHandler.cpp), the per-image SecurOffsets table holds numEntries + 1 cumulative offsets, but the check securityId \u003e= SecurOffsets.Size() admits securityId == numEntries, and the function then reads SecurOffsets[securityId + 1], fetching one UInt32 past the end of the heap-allocated CRecordVector (which performs no bounds checking on operator[]). The securityId is attacker-controlled at offset +0xC of any directory entry in WIM metadata, and the handler is registered for .wim, .swm, .esd, and .ppkg and enabled by default in stock 7z.dll; the OOB triggers zero-click in the GUI because 7zFM.exe\u0027s ListView calls GetRawProp(kpidNtSecure) for every item during listing (ASan-confirmed), and is also reachable via CLI listing with 7zz l -slt. Impact is limited to denial of service under hardened allocators and minor information disclosure, since the OOB value is only consumed arithmetically as a length and is not surfaced to the attacker; there is no write primitive."
        }
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            "attackComplexity": "LOW",
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
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          "name": "https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/",
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      "source": {
        "advisory": "GHSA-37g2-j8fj-4gf2",
        "discovery": "UNKNOWN"
      },
      "title": "GHSL-2026-119 7-Zip WIM SecurityId OOB read"
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  },
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CVE-2026-48104 (GCVE-0-2026-48104)

Vulnerability from cvelistv5 – Published: 2026-06-05 15:56 – Updated: 2026-06-05 19:08

Title

GHSL-2026-120: 7-Zip SquashFS BlockToNode uninitialized heap read

Summary

7-Zip is a file archiver with a high compression ratio. Versions 9.18 through 26.00 contain an uninitialized heap read in the SquashFS archive handler caused by a sparsely populated index array. In the SquashFS handler, _blockToNode is allocated with capacity for every metadata block but populated only when an inode crosses a block boundary, so a crafted image with few inodes spanning many blocks leaves most slots holding raw heap contents (the underlying allocator does not zero-initialize POD storage). When OpenDir looks up an attacker-influenced blockIndex (derived from the RootInode superblock field), it reads two of these uninitialized slots and passes them as the left/right bounds of a binary search over _nodesPos, which dereferences the midpoint without bounds checking; if the resulting value happens to match the search key, the returned index is used to read a full node struct from _nodes whose fields feed further directory parsing, forming a chained OOB read primitive that is heap-layout-dependent and not reliably triggerable. The SquashFS handler is enabled by default in stock 7z.dll and the issue triggers during Open() with no interaction beyond opening the file; impact is denial of service from wild-pointer dereference and potential heap information disclosure, with no write primitive. Version 26.01 fixes the issue.

Severity

4.2 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-908 - Use of Uninitialized Resource
CWE-125 - Out-of-bounds Read

Assigner

GitHub_M

References

1 reference

URL	Tags
https://securitylab.github.com/advisories/GHSL-20…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
mcmilk	7-Zip	Affected: >= 9.18, < 26.01

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-48104",
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                  },
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                "timestamp": "2026-06-05T19:08:22.029498Z",
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    ],
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        {
          "lang": "en",
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CVE-2026-48111 (GCVE-0-2026-48111)

Vulnerability from cvelistv5 – Published: 2026-06-05 16:09 – Updated: 2026-06-08 17:19

Title

GHSL-2026-121 7-Zip UEFI DEPEX OOB Read

Summary

7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an off-by-one out-of-bounds read vulnerability in the ParseDepedencyExpression function of the UEFI firmware image parser(CPP/7zip/Archive/UefiHandler.cpp). The function validates an attacker-controlled opcode byte using > instead of >= against the element count of the 10-entry kExpressionCommands static array, allowing an opcode value of 10 to read one pointer slot (8 bytes on x64) past the end of the array in .rodata. The out-of-bounds value is then dereferenced as a const char * and passed through strlen and memcpy into the archive's Characts property, which may cause either a denial of service (access violation when the adjacent bytes do not form a valid readable pointer) or a minor information disclosure of an adjacent .rdata string literal into archive metadata. The vulnerability is reached automatically during IInArchive::Open() via the call path OpenFv/OpenCapsule → ParseVolume → ParseSections when processing a SECTION_DXE_DEPEX (0x13) or SECTION_PEI_DEPEX (0x1B) section whose first body byte is 0x0A, and the UEFI handler is enabled by default in stock 7z.dll with signature-based detection for both UEFIc and UEFIf formats. The outcome (crash vs. silent leak) is deterministic per build but linker-layout dependent, with no write primitive and no disclosure of heap data, secrets, or ASLR base addresses. Version 26.01 fixes the issue.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M

References

1 reference

URL	Tags
https://securitylab.github.com/advisories/GHSL-20…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
mcmilk	7-Zip	Affected: >= 9.18, < 26.01

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-48111",
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      "references": [
        {
          "name": "https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/"
        }
      ],
      "source": {
        "advisory": "GHSA-pg33-4prq-rj7v",
        "discovery": "UNKNOWN"
      },
      "title": "GHSL-2026-121 7-Zip UEFI DEPEX OOB Read"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-48111",
    "datePublished": "2026-06-05T16:09:31.039Z",
    "dateReserved": "2026-05-20T18:46:58.288Z",
    "dateUpdated": "2026-06-08T17:19:57.025Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-48112 (GCVE-0-2026-48112)

Vulnerability from cvelistv5 – Published: 2026-06-05 16:20 – Updated: 2026-06-05 19:38

Title

GHSL-2026-122 7-Zip Ar SYMDEF OOB Read

Summary

7-Zip is a file archiver with a high compression ratio. Versions 9.18 through 26.00 contain a heap out-of-bounds read in 7-Zip Ar handler BSD SYMDEF parser. A 4-byte heap out-of-bounds read exists in the Unix ar archive parser in 7-Zip. When parsing a BSD-style __.SYMDEF symbol table, the ParseLibSymbols function reads a 32-bit namesSize field via Get32 at a position that can equal the buffer size, reading 4 bytes past the end of the heap allocation. This reads uninitialized heap data under the default allocator. Version 26.01 patches the issue.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound
CWE-125 - Out-of-bounds Read

Assigner

GitHub_M

References

1 reference

URL	Tags
https://securitylab.github.com/advisories/GHSL-20…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
mcmilk	7-Zip	Affected: >= 9.34, < 26.01

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-48112",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-05T19:38:30.375424Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "7-Zip",
          "vendor": "mcmilk",
          "versions": [
            {
              "status": "affected",
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            }
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
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      "problemTypes": [
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              "type": "CWE"
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          ]
        },
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      ],
      "source": {
        "advisory": "GHSA-25fm-vgv2-gvcg",
        "discovery": "UNKNOWN"
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      "title": "GHSL-2026-122 7-Zip Ar SYMDEF OOB Read"
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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.

Action not permitted

WID-SEC-W-2026-1736

CVE-2026-48092 (GCVE-0-2026-48092)

CVE-2026-48101 (GCVE-0-2026-48101)

CVE-2026-48102 (GCVE-0-2026-48102)

CVE-2026-48103 (GCVE-0-2026-48103)

CVE-2026-48104 (GCVE-0-2026-48104)

CVE-2026-48111 (GCVE-0-2026-48111)

CVE-2026-48112 (GCVE-0-2026-48112)

Tags

Sightings

Nomenclature