# org.http4s:http4s-blaze-server\_2.12 (Maven) vulnerabilities

2 known vulnerabilities (2 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_2.12

## Advisories (2)

### [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.

### [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.

---

Source: cve.now
Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.
Page: https://cve.now/packages/maven/org.http4s:http4s-blaze-server_2.12
Site guide for agents: https://cve.now/llms.txt
Uses NVD data; not endorsed by NVD.