Serialize JavaScript to a superset of JSON that includes regular expressions and functions. Prior to version 7.0.5, there is a Denial of Service (DoS) vulnerability caused by CPU exhaustion. When serializing a specially crafted "array-like" object (an object that inherits from Array.prototype but has a very large length property), the process enters an intensive loop that consumes 100% CPU and hangs indefinitely. This issue has been patched in version 7.0.5.
CVE-2026-34043
“—” beside the score: it is equal to NVD's CVSS score.
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.5% (42nd percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 5.9 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-03-27) is not newer than that change (2026-06-17), so it does not.
Also known asEUVD-2026-17288 (ENISA EUVD) · GHSA-qj8w-gfj5-8c6v (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 34EG Risk 34/100
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)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.5% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (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. - EPSS PROB
- 0.5%
- EPSS %ILE
- 42nd
- 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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade 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 every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (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
March 31, 2026
Last Modified
June 17, 2026
Advisory Details (3)
Auto-updated Aug 2, 2026Denial of Service (CPU Exhaustion) via crafted array-like objects · Advisory · yahoo/serialize-javascript · GitHub
https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-qj8w-gfj5-8c6vRelease v7.0.5 (yahoo/serialize-javascript)
Patch available: yahoo/serialize-javascript v7.0.5
https://github.com/yahoo/serialize-javascript/releases/tag/v7.0.5commit f147e90269b5 (yahoo/serialize-javascript)
Patch available: yahoo/serialize-javascript v7.0.5 (contains commit f147e90269b5)
https://github.com/yahoo/serialize-javascript/commit/f147e90269b58bb6e539cfdf3d0e20d6ad14204bVendor Advisories for CVE-2026-34043(15)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:56431Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.18.27 security, enhancement & bug fix update
- RHSA-2026:34099Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.17.55 bug fix and security update
- RHSA-2026:29082Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.16.65 bug fix and security update
- RHSA-2026:24335Red Hat Product SecurityHigh
Red Hat Security Advisory: .NET 8.0 security update
- RHSA-2026:24334Red Hat Product SecurityHigh
Red Hat Security Advisory: .NET 8.0 security update
- RHSA-2026:24332Red Hat Product SecurityHigh
Red Hat Security Advisory: .NET 8.0 security update
- CVE-2026-34043Microsoft Security Response Center (MSRC)Medium
Serialize JavaScript has CPU Exhaustion Denial of Service via crafted array-like objects
- RHSA-2026:20041Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.19.32 bug fix and security update
- +7 more
Patch Availability(14)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | odf4/rook-ceph-rhel9-operator:1786706880 | 2026-08-18 | redhat |
| redhat | openshift4/ose-networking-console-plugin-rhel9:1782185607 | 2026-07-09 | redhat |
| redhat | openshift4/ose-networking-console-plugin-rhel9:1782211435 | 2026-07-01 | redhat |
| redhat | dotnet8.0-0:8.0.127-1.el9_6 | 2026-06-08 | redhat |
| redhat | dotnet8.0-0:8.0.127-1.el9_4 | 2026-06-08 | redhat |
| redhat | dotnet8.0-0:8.0.127-1.el10_0 | 2026-06-08 | redhat |
| redhat | openshift4/ose-networking-console-plugin-rhel9:1779256322 | 2026-05-27 | redhat |
| redhat | dotnet8.0-0:8.0.127-1.el8_10 | 2026-05-27 | redhat |
| redhat | dotnet8.0-0:8.0.127-1.el10_2 | 2026-05-27 | redhat |
| redhat | dotnet8.0-0:8.0.127-1.el9_8 | 2026-05-27 | redhat |
| redhat | openshift4/ose-networking-console-plugin-rhel9:1778644858 | 2026-05-20 | redhat |
| redhat | openshift4/ose-networking-console-plugin-rhel9:1778256287 | 2026-05-20 | redhat |
| redhat | openshift4/ose-networking-console-plugin-rhel9:1778532500 | 2026-05-19 | redhat |
| npm | serialize-javascript @ 7.0.5 (fixes >= 5.0.0, < 7.0.5) | — | 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
(5 across 5 ecosystems)
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-serialize-javascript | 5.0.1-2 ... 7.0.7+~5.0.4-1 (8 versions) |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-serialize-javascript | 6.0.0-2 ... 7.1.2+~5.0.4-1 (8 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-serialize-javascript | 6.0.2-1, 7.0.4+~5.0.4-1, 7.0.5+~5.0.4-1, 7.0.7+~5.0.4-1, 7.1.2+~5.0.4-1 |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-serialize-javascript | 6.0.2-1, 7.0.4+~5.0.4-1 |
| — |
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| serialize-javascript | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 44× 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 it from the CNA feed. 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). Most recent first.
Showing the most recent 98 of 243 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 145 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-11-01 07:53 UTCGHSA enrichmentGHSA-qj8w-gfj5-8c6v · GitHub severity MODERATE · GitHub CVSS 5.9
- 2026-11-01 07:53 UTCEG score recompute
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-31 12:34 UTCEG score recompute
- 2026-10-31 12:34 UTCVendor advisory
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-10-25 14:34 UTCEG score recompute
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-24 14:06 UTCEG score recompute
- 2026-10-24 14:06 UTCVendor advisory
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-18 03:46 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-17 15:40 UTCEG score recompute
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- 2026-10-17 15:40 UTCVendor advisory
- 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-12 16:13 UTCEG score recompute
- 2026-10-11 19:55 UTCEG score recompute
- 2026-10-11 17:08 UTCEG score recompute
- 2026-10-11 14:35 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-11 04:01 UTCOSV refresh
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-21 15:49 UTCOSV refresh
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-02 12:44 UTCOSV refresh
- 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-16 09:42 UTCEG score recompute
- 2026-08-16 09:42 UTCVendor advisory
- 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-14 19:07 UTCVendor advisory
- 2026-08-14 06:06 UTCEG score recompute
- 2026-08-14 06:06 UTCVendor advisory
- 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-12 20:26 UTCEG score recompute
- 2026-08-12 20:26 UTCVendor advisory
- 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-11 20:38 UTCEG score recompute
- 2026-08-11 20:38 UTCVendor advisory
Related CVEs(same product + same vendor + same CWE)
Same product
5 shownDebian:12:node-serialize-javascript · npm:serialize-javascript
Same vendor
10 shownredhat:RHSA-2026:17448 · redhat:RHSA-2026:21286 · redhat:RHSA-2026:17468
Frequently asked(5)
What is CVE-2026-34043?
When was the CVE record for CVE-2026-34043 published?
Is CVE-2026-34043 actively exploited?
What is the CVSS score of CVE-2026-34043?
How do I remediate CVE-2026-34043?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-34043
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