Vulnerability-Lookup

GHSA-3RXJ-6CGF-8CFW

Vulnerability from github – Published: 2026-01-21 15:41 – Updated: 2026-01-22 15:39

Summary

seroval Affected by Remote Code Execution via JSON Deserialization

Details

Improper input handling in the JSON deserialization component can lead to arbitrary JavaScript code execution.

The vulnerability can be exploited via overriding constant value and error deserialization, which allows indirect access to unsafe JS evaluation. This requires at least the ability to perform 4 separate requests on the same function and partial knowledge of how the serialized data is used during later runtime processing.

This vulnerability affects the fromJSON and fromCrossJSON functions in a client-to-server transmission scenario.

No known workarounds or mitigations are known, so please upgrade to the patched version.

Severity ?

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "seroval"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-23737"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-21T15:41:22Z",
    "nvd_published_at": "2026-01-21T23:15:52Z",
    "severity": "HIGH"
  },
  "details": "Improper input handling in the JSON deserialization component can lead to arbitrary JavaScript code execution.\n\nThe vulnerability can be exploited via overriding constant value and error deserialization, which allows indirect access to unsafe JS evaluation. This requires at least the ability to perform 4 separate requests on the same function and partial knowledge of how the serialized data is used during later runtime processing. \n\nThis vulnerability affects the `fromJSON` and `fromCrossJSON` functions in a client-to-server transmission scenario.\n\nNo known workarounds or mitigations are known, so please upgrade to the patched version.",
  "id": "GHSA-3rxj-6cgf-8cfw",
  "modified": "2026-01-22T15:39:49Z",
  "published": "2026-01-21T15:41:22Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-3rxj-6cgf-8cfw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23737"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/lxsmnsyc/seroval"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "seroval Affected by Remote Code Execution via JSON Deserialization"
}

CVE-2026-23737 (GCVE-0-2026-23737)

Vulnerability from cvelistv5 – Published: 2026-01-21 23:09 – Updated: 2026-01-22 21:55

Title

seroval Affected by Remote Code Execution via JSON Deserialization

Summary

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, improper input handling in the JSON deserialization component can lead to arbitrary JavaScript code execution. Exploitation is possible via overriding constant value and error deserialization, allowing indirect access to unsafe JS evaluation. At minimum, attackers need the ability to perform 4 separate requests on the same function, and partial knowledge of how the serialized data is used during later runtime processing. This vulnerability affects the fromJSON and fromCrossJSON functions in a client-to-server transmission scenario. This issue has been fixed in version 1.4.0.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

GitHub_M

References

URL

Tags

	https://github.com/lxsmnsyc/seroval/security/advi…	x_refsource_CONFIRM
	https://github.com/lxsmnsyc/seroval/commit/ce9408…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	lxsmnsyc	seroval	Affected: < 1.4.1

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23737",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-22T21:54:58.352664Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-22T21:55:09.152Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "seroval",
          "vendor": "lxsmnsyc",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.4.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, improper input handling in the JSON deserialization component can lead to arbitrary JavaScript code execution. Exploitation is possible via overriding constant value and error deserialization, allowing indirect access to unsafe JS evaluation. At minimum, attackers need the ability to perform 4 separate requests on the same function, and partial knowledge of how the serialized data is used during later runtime processing. This vulnerability affects the fromJSON and fromCrossJSON functions in a client-to-server transmission scenario. This issue has been fixed in version 1.4.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
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              "lang": "en",
              "type": "CWE"
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-21T23:09:34.670Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
      "references": [
        {
          "name": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-3rxj-6cgf-8cfw",
          "tags": [
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          ],
          "url": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-3rxj-6cgf-8cfw"
        },
        {
          "name": "https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060"
        }
      ],
      "source": {
        "advisory": "GHSA-3rxj-6cgf-8cfw",
        "discovery": "UNKNOWN"
      },
      "title": "seroval Affected by Remote Code Execution via JSON Deserialization"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "cveId": "CVE-2026-23737",
    "datePublished": "2026-01-21T23:09:34.670Z",
    "dateReserved": "2026-01-15T15:45:01.957Z",
    "dateUpdated": "2026-01-22T21:55:09.152Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-3RXJ-6CGF-8CFW

CVE-2026-23737 (GCVE-0-2026-23737)

Tags

Sightings

Nomenclature