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Vulnerabilities

Vulnerability · CVE-2026-116580

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

Published Oct 26, 2026 · catalog updated Oct 28, 2026 · Red Hat Red Hat Enterprise Linux

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-116580. EPSS is 0.34%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.34%
Remediation
Version ranges on file
Affected products
npm seroval

### Summary When rebuilt an async iterator, it called 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 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 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 . Streams and sequences are now internal class instances. The deserializer checks the source value with , so plain data and plugin values are rejected no matter which node id they use. ### Workarounds Avoid plugins whose returns functions or objects with an method when decoding untrusted input. Upgrading to 1.6.8 is recommended.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • npm seroval<= 1.6.7

How to fix CVE-2026-116580

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-116580. EPSS is 0.34%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Which versions are affected?

Compare what you have installed with <= 1.6.7. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 0.34%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 26, 2026 · Red Hat Security Data

    Detected

    seroval: seroval: Unintended function execution via crafted serialized input

  2. Oct 28, 2026 · GitHub Advisory Database

    Updated

    ### Summary When rebuilt an async iterator, it called 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 method. This is a variant of GHSA-mv8w-475r-vwqw. That fix covered the promise and stream control nodes but not

Sources

  • CVE.orgVulnerability recordCVE-2026-116580

    Official CVE identifier

    cve.org
  • GitHub Advisory DatabasePackage advisoryGHSA-7rv5-mrxv-xcr9

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

    github.com
  • GitLab Advisory DatabasePackage advisoryCVE-2026-116580

    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

    advisories.gitlab.com
  • Red Hat Security DataVendor advisoryCVE-2026-116580

    seroval: seroval: Unintended function execution via crafted serialized input

    access.redhat.com

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • GitHub Advisory DatabaseOct 30, 2026
  • GitLab Advisory DatabaseOct 29, 2026
  • CVE.orgOct 27, 2026
  • Red Hat Security DataOct 27, 2026