GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

GHSA-86VW-MFPG-WWV9

Vulnerability from github – Published: 2026-07-02 20:13 – Updated: 2026-08-03 20:49
VLAI
Summary
jsonata: Malicious inputs to "$toMillis" function can cause resource exhaustion
Details

Impact

Before JSONata 2.2.0 and 1.8.9, it is possible to craft non-matching inputs to the $toMillis function that cause superlinear backtracking in the ISO-8601 validation regex. This may lead to denial of service in applications that evaluate user-provided JSONata expressions.

Patches

This issue has been addressed in JSONata version 2.2.0 or later, and 1.8.9 or later on v1, via fixes that include https://github.com/jsonata-js/jsonata/pull/782 and https://github.com/jsonata-js/jsonata/pull/793. Applications that evaluate user-provided expressions should update ASAP to prevent exploitation.

References

https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0 https://github.com/jsonata-js/jsonata/releases/tag/v1.8.9

Credit

Thank you to Doruk Tan Öztürk for disclosing this issue.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "jsonata"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "jsonata"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-52746"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-02T20:13:55Z",
    "nvd_published_at": "2026-07-17T19:17:16Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nBefore JSONata `2.2.0` and `1.8.9`, it is possible to craft non-matching inputs to the [$toMillis](https://docs.jsonata.org/date-time-functions#tomillis) function that cause superlinear backtracking in the ISO-8601 validation regex. This may lead to denial of service in applications that evaluate user-provided JSONata expressions.\n\n### Patches\nThis issue has been addressed in JSONata version 2.2.0 or later, and 1.8.9 or later on v1, via fixes that include https://github.com/jsonata-js/jsonata/pull/782 and https://github.com/jsonata-js/jsonata/pull/793. Applications that evaluate user-provided expressions should update ASAP to prevent exploitation.\n\n### References\nhttps://github.com/jsonata-js/jsonata/releases/tag/v2.2.0\nhttps://github.com/jsonata-js/jsonata/releases/tag/v1.8.9\n\n### Credit\nThank you to Doruk Tan \u00d6zt\u00fcrk for disclosing this issue.",
  "id": "GHSA-86vw-mfpg-wwv9",
  "modified": "2026-08-03T20:49:57Z",
  "published": "2026-07-02T20:13:55Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jsonata-js/jsonata/security/advisories/GHSA-86vw-mfpg-wwv9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52746"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jsonata-js/jsonata/pull/782"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jsonata-js/jsonata/pull/793"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jsonata-js/jsonata/commit/80ba95d170f74e3f20f4f36b8b77d8c85cea7686"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jsonata-js/jsonata/commit/d6ffc17cb16a8e53c222205bd274624e919cce0b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jsonata-js/jsonata"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jsonata-js/jsonata/releases/tag/v1.8.9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "jsonata: Malicious inputs to \"$toMillis\" function can cause resource exhaustion"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

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.


Detection rules are retrieved from Rulezet.


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.