CVE-2026-78660
published 2026-10-08CVE-2026-78660: Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing…
PriorityP341high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
EPSS
0.43%
36.5th percentile
Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling.
Affected
27 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | thrift | — | — |
| buildah_project | buildah | — | — |
| confidential-containers | trustee | — | — |
| container-tools_rhel8 | buildah | — | — |
| container-tools_rhel8 | conmon | — | — |
| container-tools_rhel8 | containernetworking-plugins | — | — |
| container-tools_rhel8 | crun | — | — |
| container-tools_rhel8 | oci-seccomp-bpf-hook | — | — |
| container-tools_rhel8 | podman | — | — |
| container-tools_rhel8 | runc | — | — |
| container-tools_rhel8 | skopeo | — | — |
| container-tools_rhel8 | toolbox | — | — |
| etcd | etcd | — | — |
| git-lfs | git-lfs | — | — |
| go-toolset_rhel8 | golang | — | — |
| go_standard_library | net_http | < 1.26.9 | 1.26.9 |
| go_standard_library | net_http_internal_http2 | >= 1.27.0-0 < 1.27.2 | 1.27.2 |
| golang.org | x_net_golang.org_x_net_http2 | < 0.60.0 | 0.60.0 |
| grafana | grafana | — | — |
| helm | helm | — | — |
| inductiveautomation | ignition | — | — |
| kata-containers | kata-containers | — | — |
| kubernetes | cri-o | — | — |
| podman_project | podman | — | — |
| redhat | openshift | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
vendor_redhat7.5HIGH
vendor_ubuntu7.5HIGH
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Ubuntu
Go vulnerabilities
vendor_ubuntu·2026-10-19·CVSS 7.5
CVE-2026-56866 [HIGH] Go vulnerabilities
Title: Go vulnerabilities
Summary: Several security issues were fixed in Go.
It was discovered that Go did not enforce a maximum recursion depth when
parsing deeply nested ASN.1 structures. An attacker could possibly use this
issue to cause Go to crash, resulting in a denial of service.
(CVE-2026-33818)
It was discovered that Go incorrectly reset the depth counter when decoding
XML elements. An attacker could possibly use this issue to cause Go to
crash via deeply nested XML input, resulting in a denial of service.
(CVE-2026-56859)
It was discovered that Go incorrectly handled TLS KeyUpdate messages after
the handshake was completed. A remote attacker could possibly use this
issue to cause Go to use excessive resources, leading to a denial of
service. (CVE-2026-56862)
It was discovere
Red Hat
net/http: golang: golang.org/x/net/http2: net/http: HTTP response smuggling via malformed HTTP/2 framing headers
vendor_redhat·2026-10-08·CVSS 7.5
CVE-2026-78660 [HIGH] CWE-444 net/http: golang: golang.org/x/net/http2: net/http: HTTP response smuggling via malformed HTTP/2 framing headers
net/http: golang: golang.org/x/net/http2: net/http: HTTP response smuggling via malformed HTTP/2 framing headers
Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling.
A flaw was found in Go's net/http package. When operating as a reverse proxy, the HTTP/2 implementation does not properly validate framing-related headers in responses received from upstream servers before forwarding them to downstream HTTP/1 clients. A malicious upstream s
VulDB
Google Go net-http-internal-http2-x-net-http2 request smuggling (EUVD-2026-95425)
vuldb·2026-10-09·CVSS 7.5
CVE-2026-78660 [HIGH] Google Go net-http-internal-http2-x-net-http2 request smuggling (EUVD-2026-95425)
A vulnerability identified as problematic has been detected in Google Go. The impacted element is an unknown function of the component net-http-internal-http2-x-net-http2. The manipulation leads to http request smuggling.
This vulnerability is uniquely identified as CVE-2026-78660. The attack is possible to be carried out remotely. No exploit exists.
No detection rules found.
No public exploits indexed.
2026-10-08
Published