Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.compile() and Handlebars.precompile() accept pre-parsed AST objects while validating only selected PathExpression, NumberLiteral, and BooleanLiteral values. This issue bypasses the AST validation introduced in version 4.7.9 for CVE-2026-33937. An attacker who can supply an object instead of a template string can place JavaScript expressions in unchecked values such as Program.blockParams.length, a non-PathExpression parameter depth, a non-string StringLiteral.value, or a non-string PathExpression.original. The compiler emits those values into generated JavaScript, causing code execution in the server process when compile output renders or wherever precompile output is loaded. Applications that pass only template strings are not affected. This issue is fixed in version 4.7.10.
CVE-2026-106446
“—” beside the score: it is equal to the CVSS score beside it.
Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-08. A secondary CVSS source baseline 9.8; sources differ by 0.0.
Also known asEUVD-2026-93969 (ENISA EUVD) · GHSA-8r5x-fm3f-whwj (GitHub Security Advisories)Source: ENISA EUVD
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
A fix is available — apply it.
- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALhigh confidence
- EG Risk
- 75EG Risk 75/100
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)Severity98% × 45%Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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
- 0.8%
- EPSS %ILE
- 56th
- 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 (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 3 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, Track* at medium and Attend at high mission impact.
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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)3 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 total (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 6, 2026
Last Modified
October 7, 2026
Advisory Details (4)
Auto-updated Oct 31, 2026JavaScript Injection via AST Type Confusion in compile (bypass of CVE-2026-33937) · Advisory · handlebars-lang/handlebars.js · GitHub
https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-8r5x-fm3f-whwjv4.7.10
Patch available: handlebars-lang/handlebars.js v4.7.10
https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.10Security improvements
Patch available: handlebars-lang/handlebars.js v4.7.10 (PR #2185 merged 2026-10-05)
https://github.com/handlebars-lang/handlebars.js/pull/2185commit 703fdcc5fd6c (handlebars-lang/handlebars.js)
Patch available: handlebars-lang/handlebars.js v4.7.10 (contains commit 703fdcc5fd6c)
https://github.com/handlebars-lang/handlebars.js/commit/703fdcc5fd6cc8d1cc0c33cc19de40c467c4b8d2Vendor Advisories for CVE-2026-106446(4)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:92510Red Hat Product SecurityCritical
Red Hat Security Advisory: RHOAI 3.4.6 - Red Hat OpenShift AI
- RHSA-2026:92307Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.13.14 security update
- RHSA-2026:92303Red Hat Product SecurityHigh
Red Hat Security Advisory: multicluster engine for Kubernetes v2.8.12 security update
- GHSA-8r5x-fm3f-whwjGitHub Security AdvisoriesCritical
Handlebars: JavaScript Injection via AST Type Confusion in compile (bypass of CVE-2026-33937)
Patch Availability(4)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | rhacm2/console-rhel9:1792883111 | 2026-10-29 | redhat |
| redhat | multicluster-engine/console-mce-rhel9:1792886718 | 2026-10-29 | redhat |
| redhat | rhoai/odh-mod-arch-model-registry-rhel9:1793001827 | 2026-10-29 | redhat |
| npm | handlebars @ 4.7.10 (fixes >= 4.0.0, <= 4.7.9) | — | 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
(4 across 4 ecosystems)
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-handlebars | 3:4.7.10-1 ... 3:4.7.9-6 (8 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-handlebars | 3:4.7.10-1 ... 3:4.7.9-6 (8 versions) |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-handlebars | 3:4.7.7+~4.1.0-1 ... 3:4.7.9-6 (7 versions) |
| — |
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| handlebars | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 21× in last 7d / 68× 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 23:48 UTCEG score recompute
- 2026-11-01 23:48 UTCVendor advisory
- 2026-11-01 23:48 UTCGHSA enrichmentGHSA-8r5x-fm3f-whwj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-11-01 08:00 UTCGHSA enrichmentGHSA-8r5x-fm3f-whwj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-11-01 08:00 UTCEG score recompute
- 2026-11-01 00:58 UTCEG score recompute
- 2026-11-01 00:58 UTCVendor advisory
- 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-31 02:07 UTCEG score recompute
- 2026-10-31 02:07 UTCVendor advisory
- 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-30 03:15 UTCEG score recompute
- 2026-10-30 03:15 UTCVendor advisory
- 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-29 04:25 UTCEG score recompute
- 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-28 05:29 UTCEG score recompute
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-27 06:39 UTCEG score recompute
- 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-26 04:11 UTCEG score recompute
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-25 14:54 UTCEG score recompute
- 2026-10-25 05:20 UTCEG score recompute
Show 43 moreShow fewer
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 50th percentile
- 2026-10-24 06:29 UTCEG score recompute
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 50th percentile
- 2026-10-23 07:38 UTCEG score recompute
- 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.6% · 50th percentile
- 2026-10-22 08:45 UTCEG score recompute
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-21 09:54 UTCEG score recompute
- 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-20 11:03 UTCEG score recompute
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-19 12:11 UTCEG score recompute
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-18 05:08 UTCEG score recompute
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-17 06:57 UTCEG score recompute
- 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-16 08:04 UTCEG score recompute
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-15 07:07 UTCEG score recompute
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-14 02:58 UTCEG score recompute
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-12 16:39 UTCEG score recompute
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-11 20:14 UTCEG score recompute
- 2026-10-11 17:56 UTCEG score recompute
- 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-11 13:42 UTCEG score recompute
- 2026-10-10 22:13 UTCEG score recompute
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-09 22:57 UTCEG score recompute
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-08 19:36 UTCEG score recompute
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-08 03:00 UTCEG score recompute
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-07 23:09 UTCEG score recompute
- 2026-10-07 19:19 UTCEG score recompute
- 2026-10-07 18:47 UTCEG score recompute
- 2026-10-06 20:32 UTCEG score recompute
- 2026-10-06 19:52 UTCEG score recomputeFirst assessed: 9.8 CRITICAL
- 2026-10-06 19:51 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:12:node-handlebars
Same vendor
10 shownredhat:RHSA-2026:92303 · redhat:RHSA-2026:92510 · redhat:RHSA-2026:92307
Frequently asked(5)
What is CVE-2026-106446?
When was the CVE record for CVE-2026-106446 published?
Is CVE-2026-106446 actively exploited?
What is the CVSS score of CVE-2026-106446?
How do I remediate CVE-2026-106446?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-106446
Is Your Infrastructure Affected by CVE-2026-106446?
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