CVE-2026-13503 (GCVE-0-2026-13503)

Vulnerability from cvelistv5 – Published: 2026-06-28 15:15 – Updated: 2026-06-28 15:15
VLAI
Title
antlr ANTLR4 tokenVocab Grammar Option TokenVocabParser.java getImportedVocabFile path traversal
Summary
A vulnerability was detected in antlr ANTLR4 up to 4.13.2. Affected by this issue is the function getImportedVocabFile of the file tool/src/org/antlr/v4/parse/TokenVocabParser.java of the component tokenVocab Grammar Option Handler. The manipulation results in path traversal. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
5.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CWE
Assigner
References
URL Tags
https://vuldb.com/vuln/374497 vdb-entrytechnical-description
https://vuldb.com/vuln/374497/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13503 third-party-advisory
https://vuldb.com/submit/838686 third-party-advisory
https://github.com/wooyun123/wooyun/issues/8 exploitissue-tracking
Impacted products
Vendor Product Version
antlr ANTLR4 Affected: 4.13.0
Affected: 4.13.1
Affected: 4.13.2
    cpe:2.3:a:antlr:antlr4:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
jiazhou (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

{
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    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:antlr:antlr4:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "tokenVocab Grammar Option Handler"
          ],
          "product": "ANTLR4",
          "vendor": "antlr",
          "versions": [
            {
              "status": "affected",
              "version": "4.13.0"
            },
            {
              "status": "affected",
              "version": "4.13.1"
            },
            {
              "status": "affected",
              "version": "4.13.2"
            }
          ]
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          "type": "reporter",
          "value": "jiazhou (VulDB User)"
        },
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          "type": "coordinator",
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        }
      ],
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          "value": "A vulnerability was detected in antlr ANTLR4 up to 4.13.2. Affected by this issue is the function getImportedVocabFile of the file tool/src/org/antlr/v4/parse/TokenVocabParser.java of the component tokenVocab Grammar Option Handler. The manipulation results in path traversal. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
        }
      ],
      "metrics": [
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            "baseSeverity": "MEDIUM",
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      "providerMetadata": {
        "dateUpdated": "2026-06-28T15:15:07.671Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
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      "references": [
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          "name": "VDB-374497 | antlr ANTLR4 tokenVocab Grammar Option TokenVocabParser.java getImportedVocabFile path traversal",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/374497"
        },
        {
          "name": "VDB-374497 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/374497/cti"
        },
        {
          "name": "CVE-2026-13503 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-13503"
        },
        {
          "name": "Submit #838686 | antlr ANTLR4 4.13.2 Path Traversal tokenVocab File Read",
          "tags": [
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          ],
          "url": "https://vuldb.com/submit/838686"
        },
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          "tags": [
            "exploit",
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          "url": "https://github.com/wooyun123/wooyun/issues/8"
        }
      ],
      "timeline": [
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          "lang": "en",
          "time": "2026-06-27T00:00:00.000Z",
          "value": "Advisory disclosed"
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          "time": "2026-06-27T02:00:00.000Z",
          "value": "VulDB entry created"
        },
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          "lang": "en",
          "time": "2026-06-27T20:33:18.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "antlr ANTLR4 tokenVocab Grammar Option TokenVocabParser.java getImportedVocabFile path traversal"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-13503",
    "datePublished": "2026-06-28T15:15:07.671Z",
    "dateReserved": "2026-06-27T18:28:07.035Z",
    "dateUpdated": "2026-06-28T15:15:07.671Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.