ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-116581

Seroval: fromJSON deserializer trusts node-supplied array length and sequence doneAt (unauthenticated event-loop DoS)

Published Oct 26, 2026 · catalog updated Oct 31, 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-2026-116581. EPSS is 0.45%. 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
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.45%
Remediation
Version ranges on file
Affected products
npm seroval

### Summary and used two node fields without checking them. - An array node's element list was not checked to be an array. A small payload could set the length the decoder looped over. This part is also tracked in GHSA-wp97-x4hv-qvhp. - A sequence node's done index was not checked. A crafted value produced an iterator that never finished. ### Impact A service that passes untrusted input to or can be made unavailable by an unauthenticated request. - The array case blocks the thread while the decoder runs. - The sequence case makes any code that reads the resulting iterator to the end run forever. ### Patches Fixed in . - Element lists must be arrays. - A sequence node's throw and done indices must be integers from -1 up to the last element index. Invalid input throws . ### Workarounds None. Upgrade to 1.6.8.

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 seroval0 → 1.6.8
  • npm seroval<= 1.6.7

How to fix CVE-2026-116581

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-2026-116581. EPSS is 0.45%. 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 0 → 1.6.8, <= 1.6.7. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-1284; CWE-835: Infinite Loop. EPSS 0.45%. 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: Denial of Service via crafted sequence node during deserialization

  2. Oct 28, 2026 · GitHub Advisory Database

    Fix available

    seroval fixed in 1.6.8

  3. Oct 28, 2026 · GitHub Advisory Database

    Fix available

    seroval fixed in 1.6.8

  4. Oct 28, 2026 · GitHub Advisory Database

    Updated

    ### Summary and used two node fields without checking them. - An array node's element list was not checked to be an array. A small payload could set the length the decoder looped over. This part is also tracked in GHSA-wp97-x4hv-qvhp. - A sequence node's done index was not checked. A crafted value produced an iterator that never finished. ### Impact A service that passes untrusted input to or can

  5. Oct 31, 2026 · NIST NVD

    Updated

    Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON and fromCrossJSON do not validate a sequence node's done index. A crafted done index can create an iterator that never finishes when application code consumes it to completion. An unauthenticated request to a service that deserializes untrusted input can t

Sources

  • CVE.orgVulnerability recordCVE-2026-116581

    Official CVE identifier

    cve.org
  • GitHub Advisory DatabasePackage advisoryGHSA-97r2-qh9m-474h

    Seroval: fromJSON deserializer trusts node-supplied array length and sequence doneAt (unauthenticated event-loop DoS)

    github.com
  • GitLab Advisory DatabasePackage advisoryCVE-2026-116581

    fromJSON and fromCrossJSON used two node fields without checking them. An array node's element list was not checked to be an array. A small payload could set the length the decoder looped over. This part is also tracked in GHSA-wp97-x4hv-qvhp. A sequence node's done index was not checked. A crafted value produced an iterator that never finished.

    advisories.gitlab.com
  • NIST NVDVulnerability recordCVE-2026-116581

    Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON and fromCrossJSON do not validate a sequence node's done index. A crafted done index can create an iterator that never finishes when app

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryGHSA-97r2-qh9m-474h

    Seroval: fromJSON deserializer trusts node-supplied array length and sequence doneAt (unauthenticated event-loop DoS)

    osv.dev
  • Red Hat Security DataVendor advisoryCVE-2026-116581

    seroval: seroval: Denial of Service via crafted sequence node during deserialization

    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.

  • NIST NVDOct 31, 2026
  • GitHub Advisory DatabaseOct 30, 2026
  • GitLab Advisory DatabaseOct 29, 2026
  • OpenSSF OSV / OSV ScannerOct 29, 2026
  • CVE.orgOct 27, 2026
  • Red Hat Security DataOct 27, 2026