CVE-2026-54340: Uncontrolled Resource Consumption

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 9265bdd, there is an HTTP/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by stalled HTTP/2 streams,...

CVE-2026-54340

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 9265bdd, there is an HTTP/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by stalled HTTP/2 streams,...

CVE-2026-44982: Protection Mechanism Failure

CrowdSec offers crowdsourced protection against malicious IPs. From 1.5.0 until 1.7.8, pkg/appsec/request.go NewParsedRequestFromRequest allocated a request body buffer from maxr.ContentLength, 0, so HTTP/1.1 requests using Transfer-Encoding: chunked and HTTP/2 requests without a content-length...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via HTTP/2 request processing. An attacker can cause a denial of service by sending crafted HTTP/2 traffic that triggers an out-of-memory condition, exhausting available memory and...

CVE-2026-59762: Allocation of Resources Without Limits or Throttling

When an HTTP/2 profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization. Impact: System performance can degrade until the TMM process is either forced to restart or is manually restarted. This vulnerability allows a remote,...

AZL-92402 CVE-2026-15713 affecting package libsoup 3.4.4-16

A vulnerability was found in libsoup's HTTP/2 protocol implementation. The library fails to correctly release memory context blocks under specific stream termination conditions, such as when an HTTP/2 connection encounters window exhaustion or explicit stream resets. A remote, unauthenticated...

CVE-2026-15713

A vulnerability was found in libsoup's HTTP/2 protocol implementation. The library fails to correctly release memory context blocks under specific stream termination conditions, such as when an HTTP/2 connection encounters window exhaustion or explicit stream resets. A remote, unauthenticated...

AZL-92409 CVE-2026-15712 affecting package libsoup 3.4.4-16

A heap buffer over-read vulnerability was discovered in libsoup's versions: libsoup 3.0 to 3.7.0 HTTP/2 connection tracking framework. When the library processes an HTTP/2 GOAWAY frame, it improperly handles the "Additional Debug Data" payload by assuming the data stream is a safely NUL-terminate...

CVE-2026-15712: Out-of-bounds Read

A heap buffer over-read vulnerability was discovered in libsoup's HTTP/2 connection tracking framework. When the library processes an HTTP/2 GOAWAY frame, it improperly handles the "Additional Debug Data" payload by assuming the data stream is a safely NUL-terminated C-string. Because the parser...