Medium · CVSS 6.1CVE-2026-115762

draw.io: Prototype pollution in GraphML (mxGraphMlCodec)CVE-2026-115762

Answer in brief

CVE-2026-115762 records a Medium severity (CVSS 6.1) vulnerability in draw.io: Prototype pollution in GraphML (mxGraphMlCodec). The current sources do not mark it as known exploited. The current feed maps jgraph/drawio (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 4, 2026Updated Nov 4, 2026Source checked Nov 4, 2026First seen by HOL Nov 4, 2026Material review Nov 4, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 6.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps jgraph/drawio (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
jgraph/drawiogeneric	<31.1.5	31.1.5

Recommended response

Check inventory. Check lockfiles and deployed manifests for jgraph/drawio.
Review the reported fix. Update jgraph/drawio to 31.1.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Nov 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Nov 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Nov 4, 2026

Sources and claim methodology

Upstream source description

draw.io is a configurable diagramming and whiteboarding application. Prior to 31.1.5, the GraphML decoder contains a prototype-pollution vulnerability. Attacker-controlled GraphML reference keys can address inherited object properties, including prototype objects, and the decoder can then assign attacker-controlled attributes to those objects. Importing a malicious GraphML file can trigger client-side prototype pollution. In the advisory-supported cross-site scripting chain, the editor is opened in Trello mode and the user invokes the Trello integration after the import, allowing the polluted state to execute script in the draw.io origin; an existing Trello connection is not required. This vulnerability is fixed in 31.1.5.

Quoted source text, attributed separately from HOL analysis.

draw.io: Incomplete SSRF blocklist in `ProxyServlet` / `Utils.sanitizeUrl`: RFC 6598 CGNAT range `100.64.0.0/10` is not blocked -> server-side request to internal CGNAT hostsSame jgraph/drawio package