Vulnerability-Lookup

CVE-2026-116580 (GCVE-0-2026-116580)

Vulnerability from cvelistv5 – Published: 2026-10-26 20:35 – Updated: 2026-10-26 20:35

Title

Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check

Summary

Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. This issue is fixed in version 1.6.8.

Severity

7.3 (High)


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

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8029 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/lxsmnsyc/seroval/security/advi…	x_refsource_CONFIRM
https://github.com/lxsmnsyc/seroval/commit/3edc78…	x_refsource_MISC
https://github.com/lxsmnsyc/seroval/commit/50926b…	x_refsource_MISC
https://github.com/lxsmnsyc/seroval/releases/tag/…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
lxsmnsyc	seroval	Affected: < 1.6.8	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "seroval",
          "vendor": "lxsmnsyc",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.6.8"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. This issue is fixed in version 1.6.8."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "CWE-502: Deserialization of Untrusted Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T20:35:49.975Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9"
        },
        {
          "name": "https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2"
        },
        {
          "name": "https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d"
        },
        {
          "name": "https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8"
        }
      ],
      "source": {
        "advisory": "GHSA-7rv5-mrxv-xcr9",
        "discovery": "UNKNOWN"
      },
      "title": "Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-116580",
    "datePublished": "2026-10-26T20:35:49.975Z",
    "dateReserved": "2026-10-26T15:03:39.035Z",
    "dateUpdated": "2026-10-26T20:35:49.975Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-116580",
      "date": "2026-10-30",
      "epss": "0.00342",
      "percentile": "0.27697"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "seroval",
                "vendor": "lxsmnsyc",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 1.6.8"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. This issue is fixed in version 1.6.8."
          }
        ],
        "id": "CVE-2026-116580",
        "lastModified": "2026-10-26T21:18:15.870",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "LOW",
                "baseScore": 7.3,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "LOW",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.4,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-26T21:18:15.523",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-502"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-10-30T04:09:30+00:00",
      "cve": "CVE-2026-116580",
      "id": "CVE-2026-116580",
      "initial_release_date": "2026-10-26T20:35:49.975000+00:00",
      "product_status:known_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "seroval: seroval: Unintended function execution via crafted serialized input",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-116580.json",
      "version": "3"
    }
  }
}

FKIE_CVE-2026-116580

Vulnerability from fkie_nvd - Published: 2026-10-26 21:18 - Updated: 2026-10-26 21:18

Severity

7.3 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2
	security-advisories@github.com	https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d
	security-advisories@github.com	https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8
	security-advisories@github.com	https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "seroval",
          "vendor": "lxsmnsyc",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.6.8"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. This issue is fixed in version 1.6.8."
    }
  ],
  "id": "CVE-2026-116580",
  "lastModified": "2026-10-26T21:18:15.870",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 7.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-26T21:18:15.523",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

GHSA-7RV5-MRXV-XCR9

Vulnerability from github – Published: 2026-10-28 21:17 – Updated: 2026-10-28 21:17

Summary

Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check

Details

Summary

When fromJSON rebuilt an async iterator, it called on() on the iterator's source without checking that the source was a seroval stream. A crafted payload could pick another value as the source, such as a function returned by an application plugin. The deserializer then called that value's on method.

This is a variant of GHSA-mv8w-475r-vwqw. That fix covered the promise and stream control nodes but not the async iterator node.

Impact

An application that passes untrusted input to fromJSON with plugins that return callable values can have those callables invoked during deserialization. What this allows depends on what the plugin's values do.

Affected versions

Versions up to 1.6.3 accept any value as the source.
1.6.4 rejects the reported payload.
1.6.5 to 1.6.7 check the source by node type, which a payload can get around by reusing a node id.
All versions up to 1.6.7 should be treated as affected.

Patches

Fixed in seroval@1.6.8. Streams and sequences are now internal class instances. The deserializer checks the source value with instanceof, so plain data and plugin values are rejected no matter which node id they use.

Workarounds

Avoid plugins whose deserialize returns functions or objects with an on method when decoding untrusted input. Upgrading to 1.6.8 is recommended.

Severity

7.3 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.6.7"
      },
      "package": {
        "ecosystem": "npm",
        "name": "seroval"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-116580"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-28T21:17:15Z",
    "nvd_published_at": "2026-10-26T21:18:15Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nWhen `fromJSON` rebuilt an async iterator, it called `on()` on the iterator\u0027s source without checking that the source was a seroval stream. A crafted payload could pick another value as the source, such as a function returned by an application plugin. The deserializer then called that value\u0027s `on` method.\n\nThis is a variant of GHSA-mv8w-475r-vwqw. That fix covered the promise and stream control nodes but not the async iterator node.\n\n### Impact\n\nAn application that passes untrusted input to `fromJSON` with plugins that return callable values can have those callables invoked during deserialization. What this allows depends on what the plugin\u0027s values do.\n\n### Affected versions\n\n- Versions up to 1.6.3 accept any value as the source.\n- 1.6.4 rejects the reported payload.\n- 1.6.5 to 1.6.7 check the source by node type, which a payload can get around by reusing a node id.\n- All versions up to 1.6.7 should be treated as affected.\n\n### Patches\n\nFixed in `seroval@1.6.8`. Streams and sequences are now internal class instances. The deserializer checks the source value with `instanceof`, so plain data and plugin values are rejected no matter which node id they use.\n\n### Workarounds\n\nAvoid plugins whose `deserialize` returns functions or objects with an `on` method when decoding untrusted input. Upgrading to 1.6.8 is recommended.",
  "id": "GHSA-7rv5-mrxv-xcr9",
  "modified": "2026-10-28T21:17:15Z",
  "published": "2026-10-28T21:17:15Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116580"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/lxsmnsyc/seroval"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2026-116580 (GCVE-0-2026-116580)

FKIE_CVE-2026-116580

GHSA-7RV5-MRXV-XCR9

Summary

Impact

Affected versions

Patches

Workarounds

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour