Vulnerability-Lookup

GHSA-XVWH-VH35-WWV2

Vulnerability from github – Published: 2026-05-26 13:30 – Updated: 2026-05-26 13:30

Details

A security vulnerability has been detected in fraillt bitsery up to 5.2.4. Affected is the function loadFromSharedState in the library include/bitsery/ext/std_smart_ptr.h. Such manipulation leads to improper validation of specified type of input. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 5.2.5 is able to address this issue. The name of the patch is 66d16516e24893bebc1c8af52bf2fe9ad0735061. Upgrading the affected component is advised.

Severity

7.3 (High)


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

2.9 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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-2026-9521"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-26T02:16:40Z",
    "severity": "LOW"
  },
  "details": "A security vulnerability has been detected in fraillt bitsery up to 5.2.4. Affected is the function loadFromSharedState in the library include/bitsery/ext/std_smart_ptr.h. Such manipulation leads to improper validation of specified type of input. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 5.2.5 is able to address this issue. The name of the patch is 66d16516e24893bebc1c8af52bf2fe9ad0735061. Upgrading the affected component is advised.",
  "id": "GHSA-xvwh-vh35-wwv2",
  "modified": "2026-05-26T13:30:53Z",
  "published": "2026-05-26T13:30:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9521"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fraillt/bitsery/commit/66d16516e24893bebc1c8af52bf2fe9ad0735061"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/TrebledJ/750abc64a826f19dd2d6774724629b71"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fraillt/bitsery"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fraillt/bitsery/blob/master/CHANGELOG.md#525-2025-10-09"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fraillt/bitsery/releases/tag/v5.2.5"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/814457"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/365541"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/365541/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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"
    }
  ]
}

CVE-2026-9521 (GCVE-0-2026-9521)

Vulnerability from cvelistv5 – Published: 2026-05-26 02:00 – Updated: 2026-05-26 12:21 X_Open Source

Title

fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input

Summary

Severity

6.3 (Medium)


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

7.3 (High)


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

7.3 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-26 12:19 UTC

CWE

CWE-1287 - Improper Validation of Specified Type of Input
CWE-20 - Improper Input Validation

Assigner

VulDB mitre root Scorecard

References

8 references

URL	Tags
https://vuldb.com/vuln/365541	vdb-entrytechnical-description
https://vuldb.com/vuln/365541/cti	signaturepermissions-required
https://vuldb.com/submit/814457	third-party-advisory
https://gist.github.com/TrebledJ/750abc64a826f19d…	exploit
https://github.com/fraillt/bitsery/blob/master/CH…	release-notes
https://github.com/fraillt/bitsery/commit/66d1651…	patch
https://github.com/fraillt/bitsery/releases/tag/v5.2.5	patch
https://github.com/fraillt/bitsery/	product

Impacted products

1 product

Vendor	Product	Version
fraillt	bitsery	Affected: 5.2.0 Affected: 5.2.1 Affected: 5.2.2 Affected: 5.2.3 Affected: 5.2.4 Unaffected: 5.2.5 cpe:2.3:a:fraillt:bitsery::::::::

Credits

trebledj (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-9521",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-26T12:19:20.320392Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-26T12:21:05.803Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:fraillt:bitsery:*:*:*:*:*:*:*:*"
          ],
          "product": "bitsery",
          "vendor": "fraillt",
          "versions": [
            {
              "status": "affected",
              "version": "5.2.0"
            },
            {
              "status": "affected",
              "version": "5.2.1"
            },
            {
              "status": "affected",
              "version": "5.2.2"
            },
            {
              "status": "affected",
              "version": "5.2.3"
            },
            {
              "status": "affected",
              "version": "5.2.4"
            },
            {
              "status": "unaffected",
              "version": "5.2.5"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "trebledj (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A security vulnerability has been detected in fraillt bitsery up to 5.2.4. Affected is the function loadFromSharedState in the library include/bitsery/ext/std_smart_ptr.h. Such manipulation leads to improper validation of specified type of input. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 5.2.5 is able to address this issue. The name of the patch is 66d16516e24893bebc1c8af52bf2fe9ad0735061. Upgrading the affected component is advised."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 7.5,
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1287",
              "description": "Improper Validation of Specified Type of Input",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-26T02:00:15.197Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-365541 | fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/365541"
        },
        {
          "name": "VDB-365541 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/365541/cti"
        },
        {
          "name": "Submit #814457 | fraillt bitsery 5.2.4 CWE-1287, CWE-843 (Type Confusion)",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/814457"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://gist.github.com/TrebledJ/750abc64a826f19dd2d6774724629b71"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/fraillt/bitsery/blob/master/CHANGELOG.md#525-2025-10-09"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/fraillt/bitsery/commit/66d16516e24893bebc1c8af52bf2fe9ad0735061"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/fraillt/bitsery/releases/tag/v5.2.5"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/fraillt/bitsery/"
        }
      ],
      "tags": [
        "x_open-source"
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-25T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-05-25T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-05-25T21:22:35.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-9521",
    "datePublished": "2026-05-26T02:00:15.197Z",
    "dateReserved": "2026-05-25T19:17:31.511Z",
    "dateUpdated": "2026-05-26T12:21:05.803Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-XVWH-VH35-WWV2

CVE-2026-9521 (GCVE-0-2026-9521)

Tags

Sightings

Nomenclature

Related by attack behaviour