CVE-2026-50178Network attack vector

Remote code execution via trusted JSDoc hover links

Published Jun 22, 2026 · Updated Jun 22, 2026

Code injection in Angular Language Service before 21.2.4 allows remote attackers to execute commands through a crafted JSDoc hover link. The server forwards unsanitized brackets, links, and control characters from JSDoc into Markdown that the client renders with isTrusted enabled. Exploitation requires the extension to be active, a crafted project or dependency to be opened, and the developer to hover over a symbol and click the link.

CVSS severity8.7
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Code injection in Angular Language Service before 21.2.4 allows remote attackers to execute commands through a crafted JSDoc hover link. The server forwards unsanitized brackets, links, and control characters from JSDoc into Markdown that the client renders with isTrusted enabled. Exploitation requires the extension to be active, a crafted project or dependency to be opened, and the developer to hover over a symbol and click the link.

The record

CVE
CVE-2026-50178
Published
Jun 22, 2026
Updated
Jun 22, 2026
Vendor
Go standard library
Product
Angular Language Service
Classifications
CWE-94, CWE-79, T1204.001, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 21.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Angular Language Serviceversion=< 21.2.4
Go standard library · Angularversion=< 21.2.4

Published CVSS scores

8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo