Satori is a library to convert HTML and CSS to SVG. Starting in version 0.0.27 and prior to version 0.33.5, Satori does not properly escape certain values before including them in generated SVG output. This can allow crafted values to be interpreted as SVG markup. The impact depends on how the generated SVG is consumed. Version 0.33.5 contains a patch. No complete workaround exists besides upgrading. Applications that cannot immediately upgrade should not render attacker-controlled content with Satori.
CVE-2026-94545
“—” beside the score: it is equal to the CVSS score beside it.
This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.1% (65th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-89994 (ENISA EUVD) · GHSA-wx4j-mvgx-mqwp (GitHub Security Advisories)Source: ENISA EUVD
- Public exploit or proof-of-concept code is available
A fix is available — apply it.
- CVSS v3
- 5.3
- EG Score
- 5.3MEDIUMmedium confidence
- EG Risk
- 40EG Risk 40/100
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)Severity53% × 45%Impact severity (EG Severity): CVSS 5.3 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.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
- 1.1%
- EPSS %ILE
- 65th
- 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 (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.
- EG Severity
- 5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
- EG Likelihood
- 1.1% 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
September 30, 2026
Last Modified
September 30, 2026
Advisory Details (6)
Auto-updated Oct 2, 2026Improper escaping in Satori-generated SVG · Advisory · vercel/satori · GitHub
https://github.com/vercel/satori/security/advisories/GHSA-wx4j-mvgx-mqwpfix: Harden SVG serialization
Patch available: vercel/satori 0.33.5 (PR #814 merged 2026-09-22)
https://github.com/vercel/satori/pull/814commit 26a52affc031 (vercel/satori)
Patch available: vercel/satori 0.33.5 (contains commit 26a52affc031)
https://github.com/vercel/satori/commit/26a52affc031216fee5882b6e965c8dbc7ac1782Remote Code Execution in next/og ImageResponse · Advisory · vercel/next.js · GitHub
https://github.com/vercel/next.js/security/advisories/GHSA-vcvr-r3jv-pc5jv16.3.6
Patch available: vercel/next.js v16.3.6
https://github.com/vercel/next.js/releases/tag/v16.3.6commit 868fad38690d (vercel/next.js)
Patch available: vercel/next.js v16.3.6 (contains commit 868fad38690d)
https://github.com/vercel/next.js/commit/868fad38690d72088868f299fa2bef339b26838eVendor Advisories for CVE-2026-94545(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 | satori @ 0.33.5 (fixes >= 0.0.27, < 0.33.5) | — | 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.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 47× 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 16:36 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-11-01 07:37 UTCGHSA enrichmentGHSA-wx4j-mvgx-mqwp · GitHub severity MODERATE
- 2026-11-01 07:37 UTCEG score recompute
- 2026-10-31 16:33 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-30 16:35 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-29 17:09 UTCEG score recompute
- 2026-10-29 16:34 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-28 16:33 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-27 16:33 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-26 16:33 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-25 16:34 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-25 13:49 UTCEG score recompute
- 2026-10-24 16:34 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-23 16:33 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-22 16:35 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-22 12:26 UTCEG score recompute
- 2026-10-21 16:34 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-20 16:34 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-19 16:33 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-18 16:33 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-18 02:58 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-16 16:45 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-15 16:33 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-14 16:34 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
Show 30 moreShow fewer
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
- 2026-10-12 16:35 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
- 2026-10-12 14:41 UTCEG score recompute
- 2026-10-11 19:11 UTCEG score recompute
- 2026-10-11 16:27 UTCEG score recompute
- 2026-10-11 14:04 UTCEG score recompute
- 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-11 13:40 UTCEG score recompute
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-10 14:38 UTCEG score recompute
- 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-09 15:11 UTCEG score recompute
- 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-08 15:36 UTCEG score recompute
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-06 16:37 UTCEG score recompute
- 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-05 17:11 UTCEG score recompute
- 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-03 18:19 UTCEG score recompute
- 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-02 18:52 UTCEG score recompute
- 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-09-30 16:24 UTCEG score recompute
- 2026-09-30 15:53 UTCEG score recompute
- 2026-09-30 15:37 UTCEG score recompute
- 2026-09-30 15:02 UTCEG score recomputeFirst assessed: 5.3 MEDIUM
- 2026-09-30 15:01 UTCMITRE cvelistV5first tracked
Publicly available exploits
(3 references)Public exploit code is referenced for this CVE (3 GitHub PoCs). Defenders should treat patch urgency accordingly.
- GitHub PoCmhtsec/CVE-2026-94545Published Sep 30, 2026
Next.js next/og unauthenticated RCE (CVE-2026-94545) - PoC
Open source ↗ - GitHub PoCEQSTLab/CVE-2026-94545Published Sep 29, 2026
Next.js RCE
Open source ↗ - GitHub PoCHassham1/CVE-2026-94545-nextjs-og-pocPublished Sep 23, 2026
CVE-2026-94545 / GHSA-vcvr-r3jv-pc5j — Next.js next/og ImageResponse SVG injection (Satori, GHSA-wx4j-mvgx-mqwp): isolated Docker validation lab with vulnerable (16.3.5) vs patched (16.3.6) controls, non-destructive Python scanner with pixel-level PNG evidence, and root-cause analysis of the upstream Satori fix. Authorized security research only.
Open source ↗
Related CVEs(same CWE)
Frequently asked(5)
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Dependency Blast Radius
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