YesWiki before 4.7.0 Read-ACL Bypass via SQL LIKE Wildcards in Usernames

{
  "id": "6e19821195b5b61db60037bf51b3a387da826b43d7ea774a7f418b38fe4f711f",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-116821",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "YesWiki before 4.7.0 Read-ACL Bypass via SQL LIKE Wildcards in Usernames",
    "summary": "YesWiki before 4.7.0 contains a read-ACL bypass in AclService::updateRequestWithACL, which interpolates usernames into SQL LIKE patterns without escaping the _ and % wildcards. Self-registered attackers can use usernames such as ___ or %%% that over-match ACL tokens, reading pages and Bazar entries restricted to other users or groups via the public Bazar listing API.",
    "evidence": "cve:CVE-2026-116821",
    "products": [
      {
        "name": {
          "value": "yeswiki",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-116821",
      "aliases": [
        "CVE-2026-116821"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 7.1,
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "privilegesRequired": "LOW",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH"
          }
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 6.5,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "integrityImpact": "NONE",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "NONE",
            "privilegesRequired": "LOW",
            "confidentialityImpact": "HIGH"
          }
        }
      ],
      "affected": [
        {
          "vendor": "YesWiki",
          "product": "yeswiki",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "4.7.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.7.0",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-26T23:05:47.763Z",
      "provider": "cve",
      "references": [
        "https://github.com/YesWiki/yeswiki/security/advisories/GHSA-q5j6-79p7-mp94",
        "https://github.com/YesWiki/yeswiki/commit/f3b0dd093a7ace47dc29a515faeb02635baceae2",
        "https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-read-acl-bypass-via-sql-like-wildcards-in-usernames"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
          "shortName": "VulnCheck",
          "dateUpdated": "2026-10-26T23:05:47.763Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116821",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 360361,
  "published_at": "2026-10-26T23:05:47.763+00:00"
}