CVE-2026-85738 (GCVE-0-2026-85738)
Vulnerability from cvelistv5
Published
2026-09-24 18:09
Modified
2026-09-28 14:51
Severity ?
6.3 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Summary
TREK is a collaborative travel planner. Prior to 3.4.0, the checkSsrf logic in server/src/utils/ssrfGuard.ts does not recognize NAT64, 6to4, or Teredo IPv6 transition addresses that encode an IPv4 destination. An authenticated user who controls a DNS record can supply a URL whose AAAA result is a transition address embedding a private, loopback, or link-local IPv4 target, and isAlwaysBlocked and isPrivateNetwork classify the address as allowed. In a deployment that routes the applicable transition format, user-facing imports, webhooks, integrations, or plugin egress can reach internal services or cloud metadata and expose returned information. This issue is fixed in version 3.4.0.
References
Impacted products
Vendor Product Version
liketrek TREK Version: < 3.4.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-85738",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-28T14:51:50.053724Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-28T14:51:56.222Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/liketrek/TREK/security/advisories/GHSA-9hpq-mrpx-mcxg"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "TREK",
          "vendor": "liketrek",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.4.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "TREK is a collaborative travel planner. Prior to 3.4.0, the checkSsrf logic in server/src/utils/ssrfGuard.ts does not recognize NAT64, 6to4, or Teredo IPv6 transition addresses that encode an IPv4 destination. An authenticated user who controls a DNS record can supply a URL whose AAAA result is a transition address embedding a private, loopback, or link-local IPv4 target, and isAlwaysBlocked and isPrivateNetwork classify the address as allowed. In a deployment that routes the applicable transition format, user-facing imports, webhooks, integrations, or plugin egress can reach internal services or cloud metadata and expose returned information. This issue is fixed in version 3.4.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-24T18:09:31.268Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/liketrek/TREK/security/advisories/GHSA-9hpq-mrpx-mcxg",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/liketrek/TREK/security/advisories/GHSA-9hpq-mrpx-mcxg"
        },
        {
          "name": "https://github.com/liketrek/TREK/pull/1540",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/liketrek/TREK/pull/1540"
        },
        {
          "name": "https://github.com/liketrek/TREK/commit/a2bd9be184a94997105ce190dad920c41e7b10df",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/liketrek/TREK/commit/a2bd9be184a94997105ce190dad920c41e7b10df"
        },
        {
          "name": "https://github.com/liketrek/TREK/releases/tag/v3.4.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/liketrek/TREK/releases/tag/v3.4.0"
        }
      ],
      "source": {
        "advisory": "GHSA-9hpq-mrpx-mcxg",
        "discovery": "UNKNOWN"
      },
      "title": "TREK: SSRF Guard Bypass via IPv6 Transition Addresses (NAT64/6to4)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-85738",
    "datePublished": "2026-09-24T18:09:31.268Z",
    "dateReserved": "2026-09-04T14:50:16.719Z",
    "dateUpdated": "2026-09-28T14:51:56.222Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-85738\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-28T14:51:50.053724Z\"}}}], \"references\": [{\"url\": \"https://github.com/liketrek/TREK/security/advisories/GHSA-9hpq-mrpx-mcxg\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-28T14:51:33.529Z\"}}], \"cna\": {\"title\": \"TREK: SSRF Guard Bypass via IPv6 Transition Addresses (NAT64/6to4)\", \"source\": {\"advisory\": \"GHSA-9hpq-mrpx-mcxg\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 6.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"liketrek\", \"product\": \"TREK\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 3.4.0\"}]}], \"references\": [{\"url\": \"https://github.com/liketrek/TREK/security/advisories/GHSA-9hpq-mrpx-mcxg\", \"name\": \"https://github.com/liketrek/TREK/security/advisories/GHSA-9hpq-mrpx-mcxg\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/liketrek/TREK/pull/1540\", \"name\": \"https://github.com/liketrek/TREK/pull/1540\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/liketrek/TREK/commit/a2bd9be184a94997105ce190dad920c41e7b10df\", \"name\": \"https://github.com/liketrek/TREK/commit/a2bd9be184a94997105ce190dad920c41e7b10df\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/liketrek/TREK/releases/tag/v3.4.0\", \"name\": \"https://github.com/liketrek/TREK/releases/tag/v3.4.0\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"TREK is a collaborative travel planner. Prior to 3.4.0, the checkSsrf logic in server/src/utils/ssrfGuard.ts does not recognize NAT64, 6to4, or Teredo IPv6 transition addresses that encode an IPv4 destination. An authenticated user who controls a DNS record can supply a URL whose AAAA result is a transition address embedding a private, loopback, or link-local IPv4 target, and isAlwaysBlocked and isPrivateNetwork classify the address as allowed. In a deployment that routes the applicable transition format, user-facing imports, webhooks, integrations, or plugin egress can reach internal services or cloud metadata and expose returned information. This issue is fixed in version 3.4.0.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-918\", \"description\": \"CWE-918: Server-Side Request Forgery (SSRF)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-09-24T18:09:31.268Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-85738\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-28T14:51:56.222Z\", \"dateReserved\": \"2026-09-04T14:50:16.719Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-09-24T18:09:31.268Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.