# org.http4s:http4s-blaze-server\_2.13 (Maven) vulnerabilities

3 known vulnerabilities (3 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Dependents: 0
- Registry: https://central.sonatype.com/artifact/org.http4s/http4s-blaze-server_2.13

## Advisories (3)

### [CVE-2026-73494](https://cve.now/CVE-2026-73494): blaze: Multiple HTTP/1.1 request-smuggling primitives in blaze's Java wire parser

- Severity: High 7.4
- Published: Sep 14, 2026
- Affected: fixed in 0.23.18.

### [CVE-2026-73493](https://cve.now/CVE-2026-73493): http4s-blaze-server: Unbounded WebSocket message aggregation

- Severity: High 7.5
- Published: Aug 12, 2026
- Affected: fixed in 0.23.18; from 1.0.0-M1, fixed in 1.0.0-M42.

### [CVE-2021-21294](https://cve.now/CVE-2021-21294): Unbounded connection acceptance in http4s-blaze-server

- Severity: High 7.5
- Published: Feb 2, 2021
- Affected: fixed in 0.21.17.

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