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.
CVE-2026-116580
HIGHPre-NVD 7.37.3
EchelonGraph scoreHIGH confidence
“—” beside the score: it is equal to the CVSS score beside it.
Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-10-28. A secondary CVSS source baseline 7.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Also known asEUVD-2026-110242 (ENISA EUVD) · GHSA-7rv5-mrxv-xcr9 (GitHub Security Advisories)Source: ENISA EUVD
7.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.3Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 7.3
- EG Score
- 7.3HIGHhigh confidence
- EG Risk
- 48EG Risk 48/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity73% × 45%Impact severity (EG Severity): CVSS 7.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.3% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.3%
- EPSS %ILE
- 28th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.3): severity, escalated by confirmed exploitation. This CVE's 7.3 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.3 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-08). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
October 26, 2026
Last Modified
November 2, 2026
Advisory Details (3)
Auto-updated Oct 26, 2026Patch available. Sources: github_commit, github.
GitHub commit Patch Available
commit 50926b3ee198 (lxsmnsyc/seroval)
Patch available: lxsmnsyc/seroval [email protected] (contains commit 50926b3ee198)
https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8dGitHub commit Patch Available
commit 3edc78b495ea (lxsmnsyc/seroval)
Patch available: lxsmnsyc/seroval [email protected] (contains commit 3edc78b495ea)
https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2GitHub advisoryMentions a patch (unverified)
Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check · Advisory · lxsmnsyc/seroval · GitHub
https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9Vendor Advisories for CVE-2026-116580(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| npm | seroval @ 1.6.8 (fixes <= 1.6.7) | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| seroval | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 23× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.
- 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.3% · 28th percentile
- 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.3% · 28th percentile
- 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.3% · 28th percentile
- 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-11-09 14:08 UTCEchelonGraph re-scored
- 2026-11-09 14:08 UTCGHSA enrichmentGHSA-7rv5-mrxv-xcr9 · GitHub severity HIGH · GitHub CVSS 7.3
- 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-11-02 19:27 UTCEchelonGraph re-scored
- 2026-11-02 19:27 UTCGHSA enrichmentGHSA-7rv5-mrxv-xcr9 · GitHub severity HIGH · GitHub CVSS 7.3
- 2026-11-02 18:23 UTCEchelonGraph re-scored
- 2026-11-02 18:23 UTCGHSA enrichmentGHSA-7rv5-mrxv-xcr9 · GitHub severity HIGH · GitHub CVSS 7.3
- 2026-11-02 17:00 UTCEchelonGraph re-scored
- 2026-11-02 17:00 UTCGHSA enrichmentGHSA-7rv5-mrxv-xcr9 · GitHub severity HIGH · GitHub CVSS 7.3
- 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
Show 4 moreShow fewer
- 2026-10-26 21:41 UTCEchelonGraph re-scored
- 2026-10-26 21:01 UTCENISA EUVD ID recordedEUVD-2026-110242 · Source: ENISA EUVD
- 2026-10-26 20:43 UTCEchelonGraph re-scoredFirst assessed: 7.3 HIGH
- 2026-10-26 20:40 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same CWE)
Same product
10 shownnpm:seroval
Frequently asked(5)
What is CVE-2026-116580?
CVE-2026-116580 is a high-severity vulnerability; its CVE record was published on October 26, 2026. 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…
When was the CVE record for CVE-2026-116580 published?
The CVE record for CVE-2026-116580 was published on October 26, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 2, 2026; the record at its source may have been updated since.
Is CVE-2026-116580 actively exploited?
CVE-2026-116580 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (28th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-116580?
CVE-2026-116580 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-116580?
A fix for CVE-2026-116580 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-116580 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-116580
Is Your Infrastructure Affected by CVE-2026-116580?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.