CVE-2026-69204 Http4s: Ember accepts Transfer-Encoding combined with Content-Length (CL.TE request smuggling)

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember HTTP/1.1 does not reject messages containing both Transfer-Encoding and Content-Length, so an intermediary and Ember can select different body framing rules. When ember-server is behind a keep-alive intermediary...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification through the Hpack.decodeHeaders path in ember-core/shared/src/main/scala/org/http4s/ember/core/h2/Hpack.scala. An attacker can exhaust heap memory and crash an HTTP/2 server...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification through the Hpack.decodeHeaders path in ember-core/shared/src/main/scala/org/http4s/ember/core/h2/Hpack.scala. An attacker can exhaust heap memory and crash an HTTP/2 server...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification through the Hpack.decodeHeaders path in ember-core/shared/src/main/scala/org/http4s/ember/core/h2/Hpack.scala. An attacker can exhaust heap memory and crash an HTTP/2 server...

CVE-2026-54556

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, an unauthenticated HTTP/2 peer can cause an out-of-memory denial of service in the Ember backend with HTTP/2 enabled. The Hpack wrapper in ember-core/shared/src/main/scala/org/http4s/ember/core/h2/Hpack.scala...

GHSA-VMM3-XGCX-67HM http4s has HTTP/2 Denial of Service with Ember Backend

Summary http4s 0.23.x and 1.0 servers running ember with http2 enabled are vulnerable to a denial of service attack using a HPACK bomb vulnerability recently disclosed as affecting other http2 servers. Impact Denial of Service: - Affects any http4s server running the ember backend with HTTP/2...

http4s has HTTP/2 Denial of Service with Ember Backend

Summary http4s 0.23.x and 1.0 servers running ember with http2 enabled are vulnerable to a denial of service attack using a HPACK bomb vulnerability recently disclosed as affecting other http2 servers. Impact Denial of Service: - Affects any http4s server running the ember backend with HTTP/2...

CVE-2026-54556 Http4s: HTTP/2 Denial of Service with Ember Backend

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, an unauthenticated HTTP/2 peer can cause an out-of-memory denial of service in the Ember backend with HTTP/2 enabled. The Hpack wrapper in ember-core/shared/src/main/scala/org/http4s/ember/core/h2/Hpack.scala...

CVE-2026-54556

http4s (Scala HTTP library) versions prior to 0.23.35 and 1.0.0-M47 are vulnerable to an out-of-memory denial of service when using the Ember backend with HTTP/2 enabled. The root cause is a HPACK bomb : the Hpack wrapper concatenates HEADERS and CONTINUATION frame fragments into a single decoded...

CVE-2026-54556 Http4s: HTTP/2 Denial of Service with Ember Backend

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, an unauthenticated HTTP/2 peer can cause an out-of-memory denial of service in the Ember backend with HTTP/2 enabled. The Hpack wrapper in ember-core/shared/src/main/scala/org/http4s/ember/core/h2/Hpack.scala...

EUVD-2026-66558

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, an unauthenticated HTTP/2 peer can cause an out-of-memory denial of service in the Ember backend with HTTP/2 enabled. The Hpack wrapper in ember-core/shared/src/main/scala/org/http4s/ember/core/h2/Hpack.scala...

GHSA-X3G7-QRWC-F6C5 Ember has unneutralized terminal escape/control sequences from Caddy logs injected into the operator's TUI

Summary Ember's interactive TUI renders fields taken from the monitored Caddy server's access logs — most notably the request URI — straight to the operator's terminal without neutralising terminal escape or control sequences CWE-150. Those log fields are populated from arbitrary, unauthenticated...

Ember has unneutralized terminal escape/control sequences from Caddy logs injected into the operator's TUI

Summary Ember's interactive TUI renders fields taken from the monitored Caddy server's access logs — most notably the request URI — straight to the operator's terminal without neutralising terminal escape or control sequences CWE-150. Those log fields are populated from arbitrary, unauthenticated...

PT-2026-80742

Name of the Vulnerable Software and Affected Versions Ember affected versions not specified Description An unauthenticated remote attacker can inject terminal escape sequences into the operator's terminal user interface TUI by sending HTTP requests with control bytes in the request target to a...

CVE-2026-71286

The render-template component of ember-dynamic-render-template addon/components/render-template.js passes its property directly into Ember/Glimmer's compileTemplate from @ember/template-compilation with no sanitization, allow-listing, or validation of the input...

CVE-2026-71286

The CVE-2026-71286 entry affects ember-dynamic-render-template’s render-template component, where addon/components/render-template.js forwards the templateString directly to Ember/Glimmer’s compileTemplate() without sanitization or validation. This enables client-side template injection, as attac...

CVE-2026-71286 ember-dynamic-render-template Client-Side Template Injection via Unsanitized templateString

The render-template component of ember-dynamic-render-template addon/components/render-template.js passes its property directly into Ember/Glimmer's compileTemplate from @ember/template-compilation with no sanitization, allow-listing, or validation of the input...

CVE-2026-71286 ember-dynamic-render-template Client-Side Template Injection via Unsanitized templateString

The render-template component of ember-dynamic-render-template addon/components/render-template.js passes its property directly into Ember/Glimmer's compileTemplate from @ember/template-compilation with no sanitization, allow-listing, or validation of the input...

CVE-2026-71286 ember-dynamic-render-template Client-Side Template Injection via Unsanitized templateString

The render-template component of ember-dynamic-render-template addon/components/render-template.js passes its property directly into Ember/Glimmer's compileTemplate from @ember/template-compilation with no sanitization, allow-listing, or validation of the input...

CVE-2026-71286

The render-template component of ember-dynamic-render-template addon/components/render-template.js passes its property directly into Ember/Glimmer's compileTemplate from @ember/template-compilation with no sanitization, allow-listing, or validation of the input...