# Http4s-Ember-Core vulnerabilities

Source: https://junglewise.ai/threats/technologies/http4s-ember-core  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/http4s-ember-core.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 10 vulnerabilities in Http4s-Ember-Core: 0 in the last 7 days and 10 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-88975, was published on 15 September 2026. Nothing in the last four weeks, down from 9 vulnerabilities in the four before. 0 critical against 1.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 10
- All time: 10 (1 critical, 0 exploited in the wild)

## About Http4s-Ember-Core

HTTP server library for Scala built on Cats effect.

## Latest Http4s-Ember-Core vulnerabilities

- [CVE-2026-88975: Http4s Ember HTTP/2 frame buffering denial of service](https://junglewise.ai/threats/cve-2026-88975-http4s-ember-http-2-frame-buffering-denial-of-service) (high, CVSS 7.5, published 15 Sep 2026)
- [CVE-2026-69218: Http4s Ember HTTP/2 unbounded continuation frame accumulation](https://junglewise.ai/threats/cve-2026-69218-http4s-ember-http-2-unbounded-continuation-frame-accumulation) (high, CVSS 7.5, published 15 Sep 2026)
- [CVE-2026-69206: Http4s DigestAuth replay attack in authorization header](https://junglewise.ai/threats/cve-2026-69206-http4s-digestauth-replay-attack-in-authorization-header) (medium, CVSS 5.9, published 15 Sep 2026)
- [CVE-2026-69205: Http4s Ember HTTP request smuggling via Transfer-Encoding parsing](https://junglewise.ai/threats/cve-2026-69205-http4s-ember-http-request-smuggling-via-transfer-encoding-parsing) (high, CVSS 8.7, published 15 Sep 2026)
- [CVE-2026-69203: Http4s Ember HTTP/2 stream limit enforcement bypass](https://junglewise.ai/threats/cve-2026-69203-http4s-ember-http-2-stream-limit-enforcement-bypass) (high, CVSS 7.5, published 15 Sep 2026)
- [CVE-2026-69202: Http4s Ember HTTP/2 unbounded inbound body buffering](https://junglewise.ai/threats/cve-2026-69202-http4s-ember-http-2-unbounded-inbound-body-buffering) (high, CVSS 7.5, published 15 Sep 2026)
- [CVE-2026-69216: Http4s Ember chunk parser lenience in HTTP request smuggling](https://junglewise.ai/threats/cve-2026-69216-http4s-ember-chunk-parser-lenience-in-http-request-smuggling) (medium, CVSS 5.4, published 15 Sep 2026)
- [CVE-2026-69213: Http4s Ember HTTP/2 unbounded outbound frame queue denial of service](https://junglewise.ai/threats/cve-2026-69213-http4s-ember-http-2-unbounded-outbound-frame-queue-denial-of) (high, CVSS 7.5, published 15 Sep 2026)
- [CVE-2026-69204: Http4s Ember HTTP request smuggling via Transfer-Encoding and Content-Length](https://junglewise.ai/threats/cve-2026-69204-http4s-ember-http-request-smuggling-via-transfer-encoding-and) (critical, CVSS 4, published 15 Sep 2026)
- [CVE-2026-54556: http4s HTTP/2 denial of service in HPACK header compression](https://junglewise.ai/threats/cve-2026-54556-http4s-http-2-denial-of-service-in-hpack-header-compression) (high, CVSS 4, published 26 Aug 2026)

## Most severe Http4s-Ember-Core vulnerabilities

- [CVE-2026-69204: Http4s Ember HTTP request smuggling via Transfer-Encoding and Content-Length](https://junglewise.ai/threats/cve-2026-69204-http4s-ember-http-request-smuggling-via-transfer-encoding-and) (critical, CVSS 4, published 15 Sep 2026)
- [CVE-2026-69205: Http4s Ember HTTP request smuggling via Transfer-Encoding parsing](https://junglewise.ai/threats/cve-2026-69205-http4s-ember-http-request-smuggling-via-transfer-encoding-parsing) (high, CVSS 8.7, published 15 Sep 2026)
- [CVE-2026-88975: Http4s Ember HTTP/2 frame buffering denial of service](https://junglewise.ai/threats/cve-2026-88975-http4s-ember-http-2-frame-buffering-denial-of-service) (high, CVSS 7.5, published 15 Sep 2026)
- [CVE-2026-69218: Http4s Ember HTTP/2 unbounded continuation frame accumulation](https://junglewise.ai/threats/cve-2026-69218-http4s-ember-http-2-unbounded-continuation-frame-accumulation) (high, CVSS 7.5, published 15 Sep 2026)
- [CVE-2026-69203: Http4s Ember HTTP/2 stream limit enforcement bypass](https://junglewise.ai/threats/cve-2026-69203-http4s-ember-http-2-stream-limit-enforcement-bypass) (high, CVSS 7.5, published 15 Sep 2026)
- [CVE-2026-69202: Http4s Ember HTTP/2 unbounded inbound body buffering](https://junglewise.ai/threats/cve-2026-69202-http4s-ember-http-2-unbounded-inbound-body-buffering) (high, CVSS 7.5, published 15 Sep 2026)
- [CVE-2026-69213: Http4s Ember HTTP/2 unbounded outbound frame queue denial of service](https://junglewise.ai/threats/cve-2026-69213-http4s-ember-http-2-unbounded-outbound-frame-queue-denial-of) (high, CVSS 7.5, published 15 Sep 2026)
- [CVE-2026-54556: http4s HTTP/2 denial of service in HPACK header compression](https://junglewise.ai/threats/cve-2026-54556-http4s-http-2-denial-of-service-in-hpack-header-compression) (high, CVSS 4, published 26 Aug 2026)
- [CVE-2026-69206: Http4s DigestAuth replay attack in authorization header](https://junglewise.ai/threats/cve-2026-69206-http4s-digestauth-replay-attack-in-authorization-header) (medium, CVSS 5.9, published 15 Sep 2026)
- [CVE-2026-69216: Http4s Ember chunk parser lenience in HTTP request smuggling](https://junglewise.ai/threats/cve-2026-69216-http4s-ember-chunk-parser-lenience-in-http-request-smuggling) (medium, CVSS 5.4, published 15 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 9 vulnerabilities in the four before. 0 critical against 1.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 1 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 9 | 1 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Http4s technologies

- [Http4s](https://junglewise.ai/threats/technologies/http4s): 6 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Http4s-Ember-Core vulnerabilities", https://junglewise.ai/threats/technologies/http4s-ember-core, 9 November 2026.