CVE-2026-78669

HIGH

7.5

CVSS v3

Description

A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values.

CWE-405

How to fix

Remediation Available

golang-1.26Debian

Fixed in:1.26.9-1CVE-2026-78669

golang-1.27Debian

Fixed in:1.27.2-1CVE-2026-78669

golang-golang-x-netDebian

Fixed in:1:0.60.0-1CVE-2026-78669

buildahRocky

Fixed in:2:1.43.1-7.el10_2RHSA-2026:88262

buildahRed Hat / RHEL

Fixed in:2:1.43.1-7.el10_2RHSA-2026:88262

buildah-debuginfoRocky

Fixed in:2:1.43.1-7.el10_2RHSA-2026:88262

buildah-debuginfoRed Hat / RHEL

Fixed in:2:1.43.1-7.el10_2RHSA-2026:88262

buildah-debugsourceRocky

Fixed in:2:1.43.1-7.el10_2RHSA-2026:88262

buildah-debugsourceRed Hat / RHEL

Fixed in:2:1.43.1-7.el10_2RHSA-2026:88262

buildah-testsRed Hat / RHEL

Fixed in:2:1.43.1-7.el10_2RHSA-2026:88262

buildah-testsRocky

Fixed in:2:1.43.1-7.el10_2RHSA-2026:88262

buildah-tests-debuginfoRocky

Fixed in:2:1.43.1-7.el10_2RHSA-2026:88262

buildah-tests-debuginfoRed Hat / RHEL

Fixed in:2:1.43.1-7.el10_2RHSA-2026:88262

collectd-libpod-statsRed Hat / RHEL

Fixed in:0:1.0.4-6.2.el8ostRHSA-2026:90330

Fixed in:0:1.0.6-9.el9ostRHSA-2026:90329

collectd-libpod-statsRocky

Fixed in:0:1.0.4-6.2.el8ostRHSA-2026:90330

Fixed in:0:1.0.6-9.el9ostRHSA-2026:90329

collectd-sensubilityRocky

Fixed in:0:0.2.1-1.3.el8ostRHSA-2026:90330

Fixed in:0:0.2.1-8.el9ostRHSA-2026:90329

collectd-sensubilityRed Hat / RHEL

Fixed in:0:0.2.1-1.3.el8ostRHSA-2026:90330

Fixed in:0:0.2.1-8.el9ostRHSA-2026:90329

collectd-sensubility-debuginfoRocky

Fixed in:0:0.2.1-1.3.el8ostRHSA-2026:90330

Fixed in:0:0.2.1-8.el9ostRHSA-2026:90329

collectd-sensubility-debuginfoRed Hat / RHEL

Fixed in:0:0.2.1-1.3.el8ostRHSA-2026:90330

Fixed in:0:0.2.1-8.el9ostRHSA-2026:90329

delveRocky

Fixed in:0:1.26.1-3.el10_0RHSA-2026:89884

Fixed in:0:1.26.1-1.el9_2.2RHSA-2026:89888

Fixed in:0:1.26.1-1.el9_6.2RHSA-2026:89933

Fixed in:0:1.26.1-1.el9_2.2RHSA-2026:89888

Fixed in:0:1.26.1-1.el9_6.2RHSA-2026:89933

delveRed Hat / RHEL

Fixed in:0:1.26.1-3.el10_0RHSA-2026:89884

Fixed in:0:1.26.1-1.el9_4.2RHSA-2026:89885

Fixed in:0:1.26.1-1.el9_6.2RHSA-2026:89933

Fixed in:0:1.26.1-1.el9_4.2RHSA-2026:89885

delve-0:1.26.1Red Hat / RHEL

Fixed in:1.module+el8.10.0+24516+40554724.aarch64::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.4.0+25181+7ce5b91c.x86_64::go-toolset:rhel8RHSA-2026:90994

Fixed in:1.module+el8.6.0+24782+a062e766.src::go-toolset:rhel8RHSA-2026:87246

Fixed in:1.module+el8.4.0+25181+7ce5b91c.src::go-toolset:rhel8RHSA-2026:90994

Fixed in:1.module+el8.8.0+24781+86ad105d.x86_64::go-toolset:rhel8RHSA-2026:87245

Fixed in:1.module+el8.8.0+24781+86ad105d.src::go-toolset:rhel8RHSA-2026:87245

Fixed in:1.module+el8.8.0+24781+86ad105d.ppc64le::go-toolset:rhel8RHSA-2026:87245

Fixed in:1.module+el8.10.0+24516+40554724.ppc64le::go-toolset:rhel8RHSA-2026:86203

delve-0:1.26.1Rocky

Fixed in:1.module+el8.4.0+25181+7ce5b91c.src::go-toolset:rhel8RHSA-2026:90994

Fixed in:1.module+el8.10.0+24516+40554724.ppc64le::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.4.0+25181+7ce5b91c.x86_64::go-toolset:rhel8RHSA-2026:90994

Fixed in:1.module+el8.10.0+24516+40554724.x86_64::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.10.0+24516+40554724.src::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.10.0+24516+40554724.aarch64::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.8.0+24781+86ad105d.ppc64le::go-toolset:rhel8RHSA-2026:87245

Fixed in:1.module+el8.6.0+24782+a062e766.src::go-toolset:rhel8RHSA-2026:87246

delve-debuginfoRed Hat / RHEL

Fixed in:0:1.26.1-3.el10_0RHSA-2026:89884

Fixed in:0:1.26.1-1.el9_4.2RHSA-2026:89885

Fixed in:0:1.26.1-1.el9_2.2RHSA-2026:89888

Fixed in:0:1.26.1-1.el9_6.2RHSA-2026:89933

Fixed in:0:1.26.1-1.el9_2.2RHSA-2026:89888

delve-debuginfoRocky

Fixed in:0:1.26.1-3.el10_0RHSA-2026:89884

Fixed in:0:1.26.1-1.el9_4.2RHSA-2026:89885

Fixed in:0:1.26.1-1.el9_6.2RHSA-2026:89933

Fixed in:0:1.26.1-1.el9_4.2RHSA-2026:89885

Fixed in:0:1.26.1-1.el9_6.2RHSA-2026:89933

delve-debuginfo-0:1.26.1Red Hat / RHEL

Fixed in:1.module+el8.6.0+24782+a062e766.x86_64::go-toolset:rhel8RHSA-2026:87246

Fixed in:1.module+el8.8.0+24781+86ad105d.x86_64::go-toolset:rhel8RHSA-2026:87245

Fixed in:1.module+el8.8.0+24781+86ad105d.ppc64le::go-toolset:rhel8RHSA-2026:87245

Fixed in:1.module+el8.10.0+24516+40554724.x86_64::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.4.0+25181+7ce5b91c.x86_64::go-toolset:rhel8RHSA-2026:90994

Fixed in:1.module+el8.10.0+24516+40554724.aarch64::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.10.0+24516+40554724.ppc64le::go-toolset:rhel8RHSA-2026:86203

delve-debuginfo-0:1.26.1Rocky

Fixed in:1.module+el8.8.0+24781+86ad105d.ppc64le::go-toolset:rhel8RHSA-2026:87245

Fixed in:1.module+el8.6.0+24782+a062e766.x86_64::go-toolset:rhel8RHSA-2026:87246

Fixed in:1.module+el8.10.0+24516+40554724.ppc64le::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.8.0+24781+86ad105d.x86_64::go-toolset:rhel8RHSA-2026:87245

Fixed in:1.module+el8.10.0+24516+40554724.x86_64::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.4.0+25181+7ce5b91c.x86_64::go-toolset:rhel8RHSA-2026:90994

Fixed in:1.module+el8.10.0+24516+40554724.aarch64::go-toolset:rhel8RHSA-2026:86203

delve-debugsourceRed Hat / RHEL

Fixed in:0:1.26.1-3.el10_0RHSA-2026:89884

Fixed in:0:1.26.1-1.el9_2.2RHSA-2026:89888

Fixed in:0:1.26.1-1.el9_6.2RHSA-2026:89933

Fixed in:0:1.26.1-1.el9_2.2RHSA-2026:89888

Fixed in:0:1.26.1-1.el9_4.2RHSA-2026:89885

delve-debugsourceRocky

Fixed in:0:1.26.1-3.el10_0RHSA-2026:89884

Fixed in:0:1.26.1-1.el9_6.2RHSA-2026:89933

Fixed in:0:1.26.1-1.el9_4.2RHSA-2026:89885

Fixed in:0:1.26.1-1.el9_6.2RHSA-2026:89933

Fixed in:0:1.26.1-1.el9_2.2RHSA-2026:89888

delve-debugsource-0:1.26.1Rocky

Fixed in:1.module+el8.8.0+24781+86ad105d.ppc64le::go-toolset:rhel8RHSA-2026:87245

Fixed in:1.module+el8.10.0+24516+40554724.x86_64::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.4.0+25181+7ce5b91c.x86_64::go-toolset:rhel8RHSA-2026:90994

Fixed in:1.module+el8.8.0+24781+86ad105d.x86_64::go-toolset:rhel8RHSA-2026:87245

Fixed in:1.module+el8.10.0+24516+40554724.aarch64::go-toolset:rhel8RHSA-2026:86203

Fixed in:1.module+el8.6.0+24782+a062e766.x86_64::go-toolset:rhel8RHSA-2026:87246

Fixed in:1.module+el8.10.0+24516+40554724.ppc64le::go-toolset:rhel8RHSA-2026:86203

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.61%probability of exploitation in 30 days

49thpercentile

Moderate risk: more likely to be exploited than 49% of all known CVEs.

References

Other references6

Related Vulnerabilities

Other CWE-405 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-11479	High	7.5	92%	-	Fix
CVE-2024-11187	High	7.5	16%	-	Fix
CVE-2025-8677	High	7.5	11%	-	Fix
CVE-2021-38447	High	8.6	2.1%	-	Fix
CVE-2021-21359	Medium	5.9	1.7%	-	Fix
CVE-2018-15492	High	7.5	1.2%	-	-

Common questions

How do I fix CVE-2026-78669?

Published advisories record a fix for 162 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-78669 being actively exploited?

Not that we know of. CVE-2026-78669 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.61% is the estimated probability that it will be exploited in the next 30 days. That is higher than 49% of all scored CVEs.

How severe is CVE-2026-78669?

CVE-2026-78669 has a CVSS v3 base score of 7.5, rated important. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-78669 affect?

Published advisories record a fix for golang-1.26 (Debian), golang-1.27 (Debian), golang-golang-x-net (Debian), buildah (Rocky), and 158 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-78669

Markdown

[![CVE-2026-78669](https://tridentstack.com/cve/badge/CVE-2026-78669.svg)](https://tridentstack.com/cve/CVE-2026-78669)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-78669"><img src="https://tridentstack.com/cve/badge/CVE-2026-78669.svg" alt="CVE-2026-78669"></a>

Check your Linux endpoints for this class of vulnerability

TridentStack Control continuously scans Linux endpoints for known vulnerabilities and deploys the fixes from the same console. 200 endpoints free forever, no credit card.

Patch your fleet free Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-09.