YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox

{
  "id": "7fa7dbe91706b370e571ddd252076e3a1420c7e28014f50ff7c1ce01f31eb30c",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-116825",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox",
    "summary": "YesWiki from 4.6.2 before 4.7.0 lacks replay protection in HttpSignatureService::verifySignature(), which never validates the Date header or tracks seen signatures. Attackers who capture a signed request to the /api/forms/{formId}/actor/inbox endpoint can replay it later to re-execute Delete, Update, Follow, or Undo actions.",
    "evidence": "cve:CVE-2026-116825",
    "products": [
      {
        "name": {
          "value": "yeswiki",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-116825",
      "aliases": [
        "CVE-2026-116825"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 8.3,
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
            "userInteraction": "NONE",
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE"
          }
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 6.5,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L",
            "integrityImpact": "HIGH",
            "userInteraction": "NONE",
            "attackComplexity": "HIGH",
            "availabilityImpact": "LOW",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "NONE"
          }
        }
      ],
      "affected": [
        {
          "vendor": "YesWiki",
          "product": "yeswiki",
          "versions": [
            {
              "status": "affected",
              "version": "4.6.2",
              "lessThan": "4.7.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.7.0",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-26T23:05:50.597Z",
      "provider": "cve",
      "references": [
        "https://github.com/YesWiki/yeswiki/security/advisories/GHSA-7m9j-h553-397x",
        "https://www.vulncheck.com/advisories/yeswiki-from-4.6.2-before-4.7.0-http-signature-replay-via-activitypub-inbox"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
          "shortName": "VulnCheck",
          "dateUpdated": "2026-10-26T23:05:50.597Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116825",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 360364,
  "published_at": "2026-10-26T23:05:50.597+00:00"
}