GO-2026-6610Published

HTTP/2 transport accepts malformed framing-related headers in net/http

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-78660

Published

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.

Source published: 8 Oct 2026 22:53:59 UTC
Source modified: 9 Oct 2026 16:23:56 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

euvd · EUVD-2026-95425

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Oct 8, 2026, 10:53:59 PM

dateUpdated: Oct 9, 2026, 4:23:56 PM

30 related source bulletins · separate from aliases

SUSE-SU-2026:24237-1: Security update for go1.27

CVE-2026-56857 · CVE-2026-56866 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-78667 · CVE-2026-78669 · CVE-2026-94439 · CVE-2026-94440 · CVE-2026-94444 · CVE-2026-94447 · CVE-2026-94448 · CVE-2026-97030 · CVE-2026-97031 · CVE-2026-97032

openSUSE-SU-2026:12304-1: prometheus-ha_cluster_exporter-1.4.3-1.1 on GA media

CVE-2026-78660

RHSA-2026:86093: Red Hat Security Advisory: golang security, bug fix, and enhancement update

CVE-2026-56866 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-78667 · CVE-2026-78669 · CVE-2026-94439 · CVE-2026-94440 · CVE-2026-94444 · CVE-2026-94447 · CVE-2026-94448 · CVE-2026-97030 · CVE-2026-97031 · CVE-2026-97032 · CVE-2026-111943

openSUSE-SU-2026:12101-1: go1.27-1.27.2-1.1 on GA media

openSUSE-SU-2026:12235-1: containerized-data-importer1.65-api-1.65.0-4.1 on GA media

CVE-2026-61801 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78669 · CVE-2026-84445

openSUSE-SU-2026:12207-1: vexctl-0.4.4+git106.aa6ffc8-1.1 on GA media

CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-78669 · CVE-2026-97032

openSUSE-SU-2026:12112-1: rclone-1.75.2-1.1 on GA media

CVE-2026-56857 · CVE-2026-56866 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-78667 · CVE-2026-78669 · CVE-2026-84445 · CVE-2026-94439 · CVE-2026-94440 · CVE-2026-94444 · CVE-2026-94447 · CVE-2026-94448 · CVE-2026-97030 · CVE-2026-97031 · CVE-2026-97032

RHSA-2026:87245: Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement update

CVE-2024-45336 · CVE-2025-4673 · CVE-2025-22866 · CVE-2025-22874 · CVE-2025-68121 · CVE-2026-27137 · CVE-2026-27143 · CVE-2026-27144 · CVE-2026-27145 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-32283 · CVE-2026-33810 · CVE-2026-33811 · CVE-2026-33814 · CVE-2026-33818 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-56866 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-78667 · CVE-2026-78669 · CVE-2026-94439 · CVE-2026-94440 · CVE-2026-94444 · CVE-2026-94447 · CVE-2026-94448 · CVE-2026-97030 · CVE-2026-97031 · CVE-2026-97032 · CVE-2026-111943

RHSA-2026:87042: Red Hat Security Advisory: golang security, bug fix, and enhancement update

openSUSE-SU-2026:12242-1: kubevirt1.9-container-disk-1.9.1-2.1 on GA media

CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78669

RHSA-2026:86196: Red Hat Security Advisory: golang security, bug fix, and enhancement update

openSUSE-SU-2026:12309-1: timoni-0.36.0-1.1 on GA media

CVE-2024-45338 · CVE-2025-22872 · CVE-2025-47911 · CVE-2025-58190 · CVE-2026-100351 · CVE-2026-100352 · CVE-2026-100353 · CVE-2026-100354 · CVE-2026-33186 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-78669 · CVE-2026-97032

SUSE-SU-2026:24475-1: Security update for google-guest-agent

CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-78669 · CVE-2026-97032

RHSA-2026:87040: Red Hat Security Advisory: golang security, bug fix, and enhancement update

WID-SEC-W-2026-3841: Golang Go: Mehrere Schwachstellen

openSUSE-SU-2026:12241-1: kubevirt1.8-container-disk-1.8.4-7.1 on GA media

CVE-2026-56854 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78662 · CVE-2026-78669 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

RHSA-2026:87043: Red Hat Security Advisory: golang security, bug fix, and enhancement update

openSUSE-SU-2026:12326-1: helm-4.3.1-3.1 on GA media

CVE-2026-116591 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-97032

RHSA-2026:87246: Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement update

SUSE-SU-2026:24239-1: Security update for go1.26

CVE-2026-56857 · CVE-2026-56866 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78667 · CVE-2026-94439 · CVE-2026-94440 · CVE-2026-94444 · CVE-2026-94447 · CVE-2026-94448 · CVE-2026-97030 · CVE-2026-97031 · CVE-2026-97032

openSUSE-SU-2026:22095-1: Security update for go1.26

openSUSE-SU-2026:12261-1: git-bug-0.11.0-3.1 on GA media

CVE-2026-110095 · CVE-2026-110180 · CVE-2026-110306 · CVE-2026-110725 · CVE-2026-110816 · CVE-2026-111756 · CVE-2026-112085 · CVE-2026-112366 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-78669 · CVE-2026-97032

RHSA-2026:90994: Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement update

CVE-2024-45336 · CVE-2025-22866 · CVE-2025-22874 · CVE-2025-68121 · CVE-2026-27137 · CVE-2026-27143 · CVE-2026-27144 · CVE-2026-27145 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-32283 · CVE-2026-33810 · CVE-2026-33811 · CVE-2026-33814 · CVE-2026-33818 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-56866 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-78667 · CVE-2026-78669 · CVE-2026-94439 · CVE-2026-94440 · CVE-2026-94444 · CVE-2026-94447 · CVE-2026-94448 · CVE-2026-97030 · CVE-2026-97031 · CVE-2026-97032 · CVE-2026-111943

openSUSE-SU-2026:12093-1: go1.26-1.26.9-1.1 on GA media

RHSA-2026:87041: Red Hat Security Advisory: golang security, bug fix, and enhancement update

openSUSE-SU-2026:22093-1: Security update for go1.27

openSUSE-SU-2026:12320-1: fleet-cli-0.16.3-1.1 on GA media

CVE-2026-111943 · CVE-2026-78659 · CVE-2026-78660

RHSA-2026:86203: Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement update

openSUSE-SU-2026:12283-1: distribution-registry-3.1.2-3.1 on GA media

CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-9703

openSUSE-SU-2026:22180-1: Security update for kubevirt1.9

CVE-2026-13622 · CVE-2026-78659 · CVE-2026-78660 · CVE-2026-78663 · CVE-2026-78669 · CVE-2026-97032

Source published: Oct 8, 2026, 10:53:59 PM (timezone not stated)
Source modified: Oct 9, 2026, 4:23:56 PM (timezone not stated)
Observed here: 7 Nov 2026 14:30:18 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

nvd · CVE-2026-78660

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Awaiting Analysis

Weakness classifications: CWE-444

Original publisher date fields

published: 2026-10-08T23:17:03.510

lastModified: 2026-10-09T17:16:49.243

Source published: 8 Oct 2026 23:17:03 UTC
Source modified: 9 Oct 2026 17:16:49 UTC
Observed here: 25 Oct 2026 16:19:04 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 · Secondary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

osv · GO-2026-6610

Published

Source published: 8 Oct 2026 22:31:09 UTC
Source modified: 16 Oct 2026 09:56:04 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.