Vulnerability-Lookup

GHSA-CVQW-CQHX-QMXC

Vulnerability from github – Published: 2026-10-23 15:31 – Updated: 2026-10-23 15:31

Details

serialize-javascript from 7.0.1 before 7.1.3 contains a cross-site scripting vulnerability that allows attackers to break out of HTML script elements by ending serialized function source text with an unescaped </script. Attackers controlling a function's source via a spoofed toString() can combine surrounding output delimiters and later values to inject live markup such as img onerror handlers.

Severity

4.7 (Medium)


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

2.3 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-115754"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T14:17:52Z",
    "severity": "LOW"
  },
  "details": "serialize-javascript from 7.0.1 before 7.1.3 contains a cross-site scripting vulnerability that allows attackers to break out of HTML script elements by ending serialized function source text with an unescaped \u003c/script. Attackers controlling a function\u0027s source via a spoofed toString() can combine surrounding output delimiters and later values to inject live markup such as img onerror handlers.",
  "id": "GHSA-cvqw-cqhx-qmxc",
  "modified": "2026-10-23T15:31:38Z",
  "published": "2026-10-23T15:31:38Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-m5mm-p8h7-m29v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115754"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yahoo/serialize-javascript/pull/235"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yahoo/serialize-javascript/commit/2864b3c6260a3bfd52d2db3e70d1a079de108a61"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yahoo/serialize-javascript/releases/tag/v7.1.3"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/serialize-javascript-7.0.1-before-7.1.3-xss-via-unescaped-script-in-function-body"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-115754 (GCVE-0-2026-115754)

Vulnerability from cvelistv5 – Published: 2026-10-23 13:20 – Updated: 2026-10-23 14:58

Title

serialize-javascript 7.0.1 before 7.1.3 XSS via unescaped </script in function body

Summary

Severity

2.3 (Low)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

4.7 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-23 14:48 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6748 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/yahoo/serialize-javascript/sec…	vendor-advisory
https://github.com/yahoo/serialize-javascript/pull/235	patchissue-tracking
https://github.com/yahoo/serialize-javascript/com…	patch
https://github.com/yahoo/serialize-javascript/rel…	release-notes
https://www.vulncheck.com/advisories/serialize-ja…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
yahoo	serialize-javascript	Affected: 7.0.1 , < 7.1.3 (semver) cpe:2.3:a:yahoo:serialize_javascript::::::::

Date Public

2026-10-22 21:28

Credits

Zachariah Mithani (AploSec)

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-115754",
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-23T14:48:53.139109Z",
                "version": "2.0.3"
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    ],
    "cna": {
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          "packageURL": "pkg:npm/serialize-javascript",
          "product": "serialize-javascript",
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          "vendor": "yahoo",
          "versions": [
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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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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