# http4s.

Every CVE that names http4s among its affected products, newest first. Vendors and products are as the CNA wrote them.

## Records, newest first

- [Http4s: Ember Server accepts duplicate Content-Length headers](https://agentprime.io/advisories/CVE-2026-69217.md)
  `CVE-2026-69217` · CVE record: http4s http4s · CVSS 8.7 High · Not analysed yet · Published 15 Sept 2026 · Tags: HTTP request smuggling
- [Http4s: WebSocket decoder accepts negative length, causing infinite decode loop](https://agentprime.io/advisories/CVE-2026-69210.md)
  `CVE-2026-69210` · CVE record: http4s http4s · CVSS 7.5 High · Not analysed yet · Published 15 Sept 2026 · Tags: Denial of service, CWE-1284
- [Http4s: FollowRedirect middleware leaks credentials over https->http same-authority redirect](https://agentprime.io/advisories/CVE-2026-69212.md)
  `CVE-2026-69212` · CVE record: http4s http4s · CVSS 5.9 Medium · Not analysed yet · Published 15 Sept 2026 · Tags: Information disclosure, Weak cryptography or TLS
- [Http4s: Set-Cookie rendering does not escape attribute delimiters](https://agentprime.io/advisories/CVE-2026-69211.md)
  `CVE-2026-69211` · CVE record: http4s http4s · CVSS 4.8 Medium · Not analysed yet · Published 15 Sept 2026 · Tags: Other injection, CWE-1286
- [Http4s: WebSocket decoder accepts unbounded message sizes](https://agentprime.io/advisories/CVE-2026-69209.md)
  `CVE-2026-69209` · CVE record: http4s http4s · CVSS 7.5 High · Not analysed yet · Published 15 Sept 2026 · Tags: Denial of service

## Filters and formats

Filters are query parameters on this URL: `q` (words, as in a web search engine: `"a phrase"`, `OR`, `-word`; an id; a package or product name), `severity` (low, medium, high or critical), `critical=1`, `kev=1`, `ecosystem` (npm, pypi, packagist, go, maven, rubygems, crates, nuget, hex), `kind=package`, `assigner` (a CNA’s short name), `min_score` and `state`. Each record’s title links to its Markdown page.

- The same list as JSON: <https://api.agentprime.io/v1/advisories?technology=http4s>
- Every list: <https://agentprime.io/advisories.md>, critical: <https://agentprime.io/advisories/critical.md>; by weakness: <https://agentprime.io/advisories/tag/sql-injection.md> and the other tags in <https://agentprime.io/llms.txt>; by technology: `/advisories/technology/<slug>.md` (`fortinet-fortimail`)

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The web page: <https://agentprime.io/advisories/technology/http4s/>. Everything for agents: <https://agentprime.io/llms.txt>.