Seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.3, deserializeTypedArray in fromJSON and fromCrossJSON trusts a deserialized source value as an ArrayBuffer and does not bound the serialized element count. An attacker can provide a small untrusted JSON object with a large length value, causing the array-like TypedArray constructor to synchronously allocate the selected number of elements and exhaust CPU or memory while starving the event loop. The offset check does not reject the crafted source because source.byteLength is undefined. DataView reaches a similar unchecked cast but throws rather than allocating, and the issue has no identified confidentiality or integrity impact. This issue is fixed in version 1.6.3.
CVE-2026-104845
“—” beside the score: it is equal to the CVSS score beside it.
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-10-05. A secondary CVSS source baseline 7.5; sources differ by 0.0.
Also known asEUVD-2026-91744 (ENISA EUVD) · GHSA-jp82-f5mq-hwhp (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
- 7.5HIGHhigh confidence
- EG Risk
- 49EG Risk 49/100
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.Exploitation0.4% × 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
- 0.4%
- EPSS %ILE
- 36th
- 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.GitHub Security Advisory CVSS
- EG Likelihood
- 0.4% 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 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 2, 2026
Last Modified
October 6, 2026
Advisory Details (3)
Auto-updated Oct 2, 2026commit e54a6f62784b (lxsmnsyc/seroval)
Fix landed in lxsmnsyc/seroval commit e54a6f62784b — awaiting tagged release
https://github.com/lxsmnsyc/seroval/commit/e54a6f62784b9e48e3a5fa2ab4089ca69fb8996ecommit ac0163e420ac (lxsmnsyc/seroval)
Fix landed in lxsmnsyc/seroval commit ac0163e420ac — awaiting tagged release
https://github.com/lxsmnsyc/seroval/commit/ac0163e420ac7dcbbefac4d069bcefad300a4851Memory exhaustion via unchecked TypedArray length in JSON deserialization · Advisory · lxsmnsyc/seroval · GitHub
https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-jp82-f5mq-hwhpVendor Advisories for CVE-2026-104845(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 @ 1.6.3 (fixes <= 1.6.2) | — | 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 10× in last 7d / 51× 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.
- 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-11-01 08:00 UTCGHSA enrichmentGHSA-jp82-f5mq-hwhp · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-11-01 08:00 UTCEG score recompute
- 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-31 02:50 UTCEG score recompute
- 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-25 14:55 UTCEG score recompute
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-24 11:29 UTCEG score recompute
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-18 05:09 UTCEG score recompute
- 2026-10-17 19:39 UTCEG score recompute
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
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- 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-12 16:40 UTCEG score recompute
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-11 20:15 UTCEG score recompute
- 2026-10-11 18:27 UTCEG score recompute
- 2026-10-11 15:01 UTCEG score recompute
- 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-11 13:27 UTCEG score recompute
- 2026-10-11 01:51 UTCEG score recompute
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-10 02:41 UTCEG score recompute
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-09 03:06 UTCEG score recompute
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-08 04:01 UTCEG score recompute
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-06 17:20 UTCEG score recompute
- 2026-10-06 16:37 UTCEG score recompute
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-06 01:21 UTCEG score recompute
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-05 02:13 UTCEG score recompute
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-03 15:33 UTCEG score recompute
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-02 16:27 UTCEG score recompute
- 2026-10-02 16:02 UTCEG score recomputeFirst assessed: 7.5 HIGH
- 2026-10-02 16:00 UTCMITRE cvelistV5first tracked
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Frequently asked(5)
What is CVE-2026-104845?
When was the CVE record for CVE-2026-104845 published?
Is CVE-2026-104845 actively exploited?
What is the CVSS score of CVE-2026-104845?
How do I remediate CVE-2026-104845?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-104845
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