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HIGH severity

CVE-2020-8215 — canvas

HIGHFix: Automattic/node-canvas@c3e4ccb

CVE-2020-8215 is a high-severity (CVSS 8.8) CWE-120 vulnerability in canvas. A fix is available for canvas — see the affected versions and patch details below.

Buffer overflow in canvas

Also known asGHSA-73rg-x683-m3qw
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs83th percentile — riskier than 83% of all scored CVEsHighest risk
1.37%1.85%2.34%2.82%1.9%2.3%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2020-8215 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

3Kother npm packages depend on this — each one inherits the vulnerability until it's patched upstream
canvasnpm
8.4Mdownloads / week

Description

A buffer overflow is present in canvas version <= 1.6.9, which could lead to a Denial of Service or execution of arbitrary code when it processes a user-provided image.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmcanvasall versions1.6.11npm install canvas@1.6.11

Affected Products

1 product · 1 configurations
Application
canvasautomattic
≤ 1.6.9
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for canvas, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update canvas to 1.6.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-8215 is resolved across your whole dependency graph.

  3. Workarounds

    Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process.

Frequently Asked Questions

A buffer overflow is present in canvas version <= 1.6.9, which could lead to a Denial of Service or execution of arbitrary code when it processes a user-provided image.
O3 Security · Impact-Aware SCA

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CVE-2020-8215: canvas RCE — Fixed in 1.6.11