Vulnerability-Lookup

CVE-2026-8258 (GCVE-0-2026-8258)

Vulnerability from cvelistv5 – Published: 2026-05-11 00:45 – Updated: 2026-05-11 12:49

Title

Squirrel sqstdstring.cpp validate_format stack-based overflow

Summary

A flaw has been found in Squirrel up to 3.2. Impacted is the function validate_format in the library sqstdlib/sqstdstring.cpp. Executing a manipulation can lead to stack-based buffer overflow. The attack can only be executed locally. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Severity

4.8 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

5.3 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

5.3 (Medium)


                        
                          CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-121 - Stack-based Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB

References

5 references

URL	Tags
https://vuldb.com/vuln/362555	vdb-entrytechnical-description
https://vuldb.com/vuln/362555/cti	signaturepermissions-required
https://vuldb.com/submit/809873	third-party-advisory
https://github.com/albertodemichelis/squirrel/iss…	issue-tracking
https://github.com/biniamf/pocs/tree/main/squirre…	exploit

Impacted products

1 product

Vendor	Product	Version
n/a	Squirrel	Affected: 3.0 Affected: 3.1 Affected: 3.2

Credits

biniam (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-8258

Vulnerability from fkie_nvd - Published: 2026-05-11 02:16 - Updated: 2026-06-17 11:03

Severity

5.3 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/albertodemichelis/squirrel/issues/325
	cna@vuldb.com	https://github.com/biniamf/pocs/tree/main/squirrel-validate_format-memcpy-oob
	cna@vuldb.com	https://vuldb.com/submit/809873
	cna@vuldb.com	https://vuldb.com/vuln/362555
	cna@vuldb.com	https://vuldb.com/vuln/362555/cti
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/albertodemichelis/squirrel/issues/325

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    }
  ],
  "id": "CVE-2026-8258",
  "lastModified": "2026-06-17T11:03:44.423",
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      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 1.9,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-8258",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-11T12:48:49.445381Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-11T02:16:27.250",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/albertodemichelis/squirrel/issues/325"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/biniamf/pocs/tree/main/squirrel-validate_format-memcpy-oob"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/809873"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/362555"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/362555/cti"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/albertodemichelis/squirrel/issues/325"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-FFF5-X34W-4V72

Vulnerability from github – Published: 2026-05-11 03:31 – Updated: 2026-05-11 03:31

Details

Severity

5.3 (Medium)


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

1.9 (Low)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-8258"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-11T02:16:27Z",
    "severity": "LOW"
  },
  "details": "A flaw has been found in Squirrel up to 3.2. Impacted is the function validate_format in the library sqstdlib/sqstdstring.cpp. Executing a manipulation can lead to stack-based buffer overflow. The attack can only be executed locally. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.",
  "id": "GHSA-fff5-x34w-4v72",
  "modified": "2026-05-11T03:31:31Z",
  "published": "2026-05-11T03:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8258"
    },
    {
      "type": "WEB",
      "url": "https://github.com/albertodemichelis/squirrel/issues/325"
    },
    {
      "type": "WEB",
      "url": "https://github.com/biniamf/pocs/tree/main/squirrel-validate_format-memcpy-oob"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/809873"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/362555"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/362555/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

ubuntu-cve-2026-8258

Vulnerability from osv_ubuntu

Published

2026-05-11 02:16

Modified

2026-06-24 08:58

Summary

Details

Severity

5.3 (Medium)


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

1.9 (Low)


                    
                      CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-8258	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-8258	REPORT
	https://github.com/albertodemichelis/squirrel/iss…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-5"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-4",
        "3.1-5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-8build1"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-8build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-8build1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-8",
        "3.1-8build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-8build1"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-8build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-8build1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-8build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-8.2"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-8.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-8.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-8.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-8.3"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-8.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-8.3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-8.2",
        "3.1-8.3"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw has been found in Squirrel up to 3.2. Impacted is the function validate_format in the library sqstdlib/sqstdstring.cpp. Executing a manipulation can lead to stack-based buffer overflow. The attack can only be executed locally. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.",
  "id": "UBUNTU-CVE-2026-8258",
  "modified": "2026-06-24T08:58:44Z",
  "published": "2026-05-11T02:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-8258"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-8258"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/albertodemichelis/squirrel/issues/325"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-8258"
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-8258 (GCVE-0-2026-8258)

FKIE_CVE-2026-8258

GHSA-FFF5-X34W-4V72

ubuntu-cve-2026-8258

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature