Security Bulletin: Impacted IBM Optim 1.0.0, 1.1.0 and 1.2.0 by a vulnerability in Go's HTTP/2 transport

Summary BM Optim versions 1.0.0, 1.1.0, and 1.2.0 include the Go net/http package, which is affected by a high-severity denial-of-service vulnerability. IBM Optim 2.0.0 resolves this vulnerability by upgrading the affected Go dependency to a fixed version. Vulnerability Details CVEID:CVE-2026-338...

SUSE CVE-2026-88004

Traefik is an open source HTTP reverse proxy and load balancer. From 3.2.0 until 3.7.13, Traefik entrypoint defenses aliasHeadersStrategy, underscoreHeadersStrategy, and forwardedHeaders inspect req.Header but not req.Trailer, allowing an unauthenticated client to submit an aliasing or trusted...

io.netty/netty-codec-http2: HTTP/1 authority-form CONNECT is translated to malformed HTTP/2 CONNECT with Host-controlled :authority

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leadi...

io.netty/netty-codec-http2: io.netty/netty-codec-http3: Netty: HTTP/2 and HTTP/3 Extended CONNECT requests are downgraded as regular CONNECT requests

A flaw was found in Netty. A remote attacker could exploit this vulnerability by sending specially crafted HTTP/2 or HTTP/3 Extended CONNECT requests. Netty's HTTP-object conversion path incorrectly processes these requests as regular HTTP/1.1 CONNECT requests, leading to a loss of critical...

io.netty/netty-codec-http2: HTTP/1 absolute-form Host mismatch is translated to HTTP/2 :authority, overriding the request-target authority

A flaw was found in Netty. A remote unauthenticated attacker can exploit a vulnerability in Netty's HTTP/1 to HTTP/2 conversion process. When an HTTP/1 request includes both an absolute-form request-target and a conflicting Host header, Netty incorrectly prioritizes the Host header for the HTTP/2...

io.netty/netty-codec-http2: Netty: HTTP/2 header field values are not validated by default (CR/LF/NUL passthrough)

A flaw was found in Netty's HTTP/2 stack. This vulnerability allows a remote attacker to inject prohibited characters, such as NUL, Line Feed, and Carriage Return, into HTTP/2 header field values due to insufficient validation. When these values cross an HTTP/2 to HTTP/1.1 translation boundary,...

io.netty/netty-codec-http2: HTTP/1 authority-form CONNECT is translated to malformed HTTP/2 CONNECT with Host-controlled :authority

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leadi...

io.netty/netty-codec-http2: Netty: HTTP/2 header field values are not validated by default (CR/LF/NUL passthrough)

A flaw was found in Netty's HTTP/2 stack. This vulnerability allows a remote attacker to inject prohibited characters, such as NUL, Line Feed, and Carriage Return, into HTTP/2 header field values due to insufficient validation. When these values cross an HTTP/2 to HTTP/1.1 translation boundary,...

io.netty/netty-codec-http2: HTTP/1 absolute-form Host mismatch is translated to HTTP/2 :authority, overriding the request-target authority

A flaw was found in Netty. A remote unauthenticated attacker can exploit a vulnerability in Netty's HTTP/1 to HTTP/2 conversion process. When an HTTP/1 request includes both an absolute-form request-target and a conflicting Host header, Netty incorrectly prioritizes the Host header for the HTTP/2...

io.netty/netty-codec-http2: io.netty/netty-codec-http3: Netty: HTTP/2 and HTTP/3 Extended CONNECT requests are downgraded as regular CONNECT requests

A flaw was found in Netty. A remote attacker could exploit this vulnerability by sending specially crafted HTTP/2 or HTTP/3 Extended CONNECT requests. Netty's HTTP-object conversion path incorrectly processes these requests as regular HTTP/1.1 CONNECT requests, leading to a loss of critical...

Denial-Of-Service (DoS)

Http4s is vulnerable to a denial-of-service DoS. The vulnerability is due to improper enforcement of HTTP/2 concurrent stream limits, which allows an unauthenticated attacker to create an unbounded number of streams and consume heap memory until exhaustion...

Denial-of-Service (DoS)

Http4s is vulnerable to a Denial-of-Service DoS. The vulnerability is due to HTTP/2 flow-control windows being replenished based on network-received bytes while DATA is stored in an unbounded channel, which allows an attacker to send HTTP/2 request bodies faster than the application consumes them...

OPENSUSE-SU-2026:21901-1 Security update for libsoup

This update for libsoup fixes the following issues: - CVE-2026-85197: heap use-after-free in HTTP/2 client ondataread via GOAWAY during body upload bsc1279238. - CVE-2026-85534: heap buffer overflow in SoupSession through ondatasourcereadcallback via SETTINGS frame with crafted INITIALWINDOWSIZE...

SUSE-SU-2026:23866-1 Security update for libsoup

This update for libsoup fixes the following issues: - CVE-2026-85197: heap use-after-free in HTTP/2 client ondataread via GOAWAY during body upload bsc1279238. - CVE-2026-85534: heap buffer overflow in SoupSession through ondatasourcereadcallback via SETTINGS frame with crafted INITIALWINDOWSIZE...

SUSE-SU-2026:23857-1 Security update for libsoup

This update for libsoup fixes the following issues: - CVE-2026-85197: heap use-after-free in HTTP/2 client ondataread via GOAWAY during body upload bsc1279238. - CVE-2026-85534: heap buffer overflow in SoupSession through ondatasourcereadcallback via SETTINGS frame with crafted INITIALWINDOWSIZE...

SUSE-SU-2026:23848-1 Security update for libsoup

This update for libsoup fixes the following issues: - CVE-2026-85197: heap use-after-free in HTTP/2 client ondataread via GOAWAY during body upload bsc1279238. - CVE-2026-85534: heap buffer overflow in SoupSession through ondatasourcereadcallback via SETTINGS frame with crafted INITIALWINDOWSIZE...

io.netty/netty-codec-http2: Netty: Denial of Service via HTTP/2 DATA frame memory leak

A flaw was found in Netty, a network application framework. A remote, unauthenticated attacker can exploit this vulnerability by sending specially crafted HTTP/2 DATA frames to applications that use Netty and have HTTP/2 content decompression enabled. This can lead to memory exhaustion, causing t...

tomcat-coyote: Apache Tomcat: HTTP/2 request headers not validated

Apache Tomcat did not validate HTTP/2 request headers, triggering unexpected application behavior, as applications may presume that header values exposed through the Servlet API would be valid...

CVE-2026-12611

A flaw was found in Jetty. A remote attacker can exploit a race condition in the server's handling of HTTP/2 RSTSTREAM and GOAWAY frames. This can lead to blocking writes that are never unblocked, causing all server threads to become unresponsive. The primary impact is a Denial of Service DoS for...

Security update for libsoup

This update for libsoup fixes the following issues: CVE-2026-85197: heap use-after-free in HTTP/2 client ondataread via GOAWAY during body upload bsc1279238. CVE-2026-85534: heap buffer overflow in SoupSession through ondatasourcereadcallback via SETTINGS frame with crafted INITIALWINDOWSIZE...