Vulnerability · Published Oct 8, 2026 · Assigned by Go

CVE-2026-78667Lack of limit on size of parsed Range headers in net/http

High 7.5

In plain English

A high-severity resource allocation without limits in net/http from Go standard library. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 58.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8aardvark-dns2:1.10.1-2.module_el8.10.0+4047+545787c4ALSA-2026:89760
AlmaLinux:8aardvark-dns2:1.10.1-2.module_el8.10.0+3901+4b80ecd7ALSA-2026:89760
AlmaLinux:8aardvark-dns2:1.10.1-2.module_el8.10.0+4023+db236c53ALSA-2026:89760
AlmaLinux:10buildah2:1.43.1-7.el10_2ALSA-2026:88262
AlmaLinux:8buildah2:1.33.15-2.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:9buildah2:1.43.4-2.el9_8ALSA-2026:90424
AlmaLinux:10buildah-tests2:1.43.1-7.el10_2ALSA-2026:88262
AlmaLinux:8buildah-tests2:1.33.15-2.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:9buildah-tests2:1.43.4-2.el9_8ALSA-2026:90424
AlmaLinux:8cockpit-podman84.1-1.module_el8.10.0+4102+6c76e544ALSA-2026:89760
AlmaLinux:8conmon3:2.1.10-2.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:8container-selinux2:2.229.0-3.module_el8.10.0+4213+0493256bALSA-2026:89760
AlmaLinux:8containernetworking-plugins1:1.4.0-11.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:8containers-common2:1-82.module_el8.10.0+4120+03ad4b47ALSA-2026:89760
AlmaLinux:8containers-common2:1-82.module_el8.10.0+3876+e55593a8ALSA-2026:89760
AlmaLinux:8containers-common2:1-82.module_el8.10.0+4016+efd18bf8ALSA-2026:89760
AlmaLinux:8containers-common2:1-82.module_el8.10.0+4089+ce72bbbeALSA-2026:89760
AlmaLinux:8crit3.18-5.module_el8.10.0+4047+545787c4ALSA-2026:89760
AlmaLinux:8crit3.18-5.module_el8.10.0+3845+87b84552ALSA-2026:89760
AlmaLinux:8crit3.18-5.module_el8.10.0+4120+03ad4b47ALSA-2026:89760
AlmaLinux:8criu3.18-5.module_el8.10.0+3845+87b84552ALSA-2026:89760
AlmaLinux:8criu3.18-5.module_el8.10.0+4120+03ad4b47ALSA-2026:89760
AlmaLinux:8criu3.18-5.module_el8.10.0+3876+e55593a8ALSA-2026:89760
AlmaLinux:8criu-devel3.18-5.module_el8.10.0+4089+ce72bbbeALSA-2026:89760
AlmaLinux:8criu-devel3.18-5.module_el8.10.0+3845+87b84552ALSA-2026:89760
AlmaLinux:8criu-devel3.18-5.module_el8.10.0+4016+efd18bf8ALSA-2026:89760
AlmaLinux:8criu-devel3.18-5.module_el8.10.0+4068+0e21408fALSA-2026:89760
AlmaLinux:8criu-libs3.18-5.module_el8.10.0+3970+8445edf6ALSA-2026:89760
AlmaLinux:8criu-libs3.18-5.module_el8.10.0+3909+6e1c1eb7ALSA-2026:89760
AlmaLinux:8criu-libs3.18-5.module_el8.10.0+4082+f7f0c95eALSA-2026:89760
AlmaLinux:8criu-libs3.18-5.module_el8.10.0+3845+87b84552ALSA-2026:89760
AlmaLinux:8crun1.14.3-4.module_el8.10.0+4269+94686149ALSA-2026:89760
AlmaLinux:10delve1.26.1-3.el10_2ALSA-2026:95519
AlmaLinux:8delve1.26.1-1.module_el8.10.0+4307+6e4cbc60ALSA-2026:86203
AlmaLinux:8fuse-overlayfs1.13-1.module_el8.10.0+3792+03eaed9cALSA-2026:89760
AlmaLinux:8fuse-overlayfs1.13-1.module_el8.10.0+3909+6e1c1eb7ALSA-2026:89760
AlmaLinux:8fuse-overlayfs1.13-1.module_el8.10.0+4068+0e21408fALSA-2026:89760
AlmaLinux:8fuse-overlayfs1.13-1.module_el8.10.0+4082+f7f0c95eALSA-2026:89760
AlmaLinux:10go-toolset1.26.10-1.el10_2.alma.1ALSA-2026:86093
AlmaLinux:8go-toolset1.26.10-1.module_el8.10.0+4307+6e4cbc60ALSA-2026:86203
AlmaLinux:9go-toolset1.26.10-1.el9_8ALSA-2026:86196
AlmaLinux:10golang1.26.10-1.el10_2.alma.1ALSA-2026:86093
AlmaLinux:8golang1.26.10-1.module_el8.10.0+4307+6e4cbc60ALSA-2026:86203
AlmaLinux:9golang1.26.10-1.el9_8ALSA-2026:86196
AlmaLinux:10golang-bin1.26.10-1.el10_2.alma.1ALSA-2026:86093
AlmaLinux:8golang-bin1.26.10-1.module_el8.10.0+4307+6e4cbc60ALSA-2026:86203
AlmaLinux:9golang-bin1.26.10-1.el9_8ALSA-2026:86196
AlmaLinux:10golang-docs1.26.10-1.el10_2.alma.1ALSA-2026:86093
AlmaLinux:8golang-docs1.26.10-1.module_el8.10.0+4307+6e4cbc60ALSA-2026:86203
AlmaLinux:9golang-docs1.26.10-1.el9_8ALSA-2026:86196
AlmaLinux:10golang-misc1.26.10-1.el10_2.alma.1ALSA-2026:86093
AlmaLinux:8golang-misc1.26.10-1.module_el8.10.0+4307+6e4cbc60ALSA-2026:86203
AlmaLinux:9golang-misc1.26.10-1.el9_8ALSA-2026:86196
AlmaLinux:10golang-race1.26.10-1.el10_2.alma.1ALSA-2026:86093
AlmaLinux:8golang-race1.26.10-1.module_el8.10.0+4307+6e4cbc60ALSA-2026:86203
AlmaLinux:9golang-race1.26.10-1.el9_8ALSA-2026:86196
AlmaLinux:10golang-src1.26.10-1.el10_2.alma.1ALSA-2026:86093
AlmaLinux:8golang-src1.26.10-1.module_el8.10.0+4307+6e4cbc60ALSA-2026:86203
AlmaLinux:9golang-src1.26.10-1.el9_8ALSA-2026:86196
AlmaLinux:10golang-tests1.26.10-1.el10_2.alma.1ALSA-2026:86093
AlmaLinux:8golang-tests1.26.10-1.module_el8.10.0+4307+6e4cbc60ALSA-2026:86203
AlmaLinux:9golang-tests1.26.10-1.el9_8ALSA-2026:86196
AlmaLinux:8grafana9.2.10-36.el8_10ALSA-2026:88188
AlmaLinux:9grafana10.2.6-23.el9_8.7ALSA-2026:89744
AlmaLinux:8grafana-selinux9.2.10-36.el8_10ALSA-2026:88188
AlmaLinux:9grafana-selinux10.2.6-23.el9_8.7ALSA-2026:89744
AlmaLinux:10ipp-usb0.9.27-7.el10_2.4ALSA-2026:88280
AlmaLinux:8libslirp4.4.0-2.module_el8.10.0+3845+87b84552ALSA-2026:89760
AlmaLinux:8libslirp4.4.0-2.module_el8.10.0+4120+03ad4b47ALSA-2026:89760
AlmaLinux:8libslirp4.4.0-2.module_el8.10.0+4016+efd18bf8ALSA-2026:89760
AlmaLinux:8libslirp4.4.0-2.module_el8.10.0+4090+91932338ALSA-2026:89760
AlmaLinux:8libslirp-devel4.4.0-2.module_el8.10.0+3845+87b84552ALSA-2026:89760
AlmaLinux:8libslirp-devel4.4.0-2.module_el8.10.0+4082+f7f0c95eALSA-2026:89760
AlmaLinux:8libslirp-devel4.4.0-2.module_el8.10.0+4102+6c76e544ALSA-2026:89760
AlmaLinux:8libslirp-devel4.4.0-2.module_el8.10.0+4068+0e21408fALSA-2026:89760
AlmaLinux:8netavark2:1.10.3-1.module_el8.10.0+4047+545787c4ALSA-2026:89760
AlmaLinux:8netavark2:1.10.3-1.module_el8.10.0+3845+87b84552ALSA-2026:89760
AlmaLinux:8netavark2:1.10.3-1.module_el8.10.0+4082+f7f0c95eALSA-2026:89760
AlmaLinux:8netavark2:1.10.3-1.module_el8.10.0+3926+f12484f5ALSA-2026:89760
AlmaLinux:10oci-seccomp-bpf-hook1.2.11-3.el10_2ALSA-2026:89752
AlmaLinux:8oci-seccomp-bpf-hook1.2.10-4.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:10opentelemetry-collector0.158.0-2.el10_2ALSA-2026:93596
AlmaLinux:9opentelemetry-collector0.158.0-2.el9_8ALSA-2026:93617
AlmaLinux:10podman7:5.8.2-11.el10_2.alma.1ALSA-2026:88336
AlmaLinux:8podman4:4.9.4-38.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:9podman6:5.8.2-8.el9_8ALSA-2026:90362
AlmaLinux:8podman-catatonit4:4.9.4-38.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:10podman-docker7:5.8.2-11.el10_2.alma.1ALSA-2026:88336
AlmaLinux:8podman-docker4:4.9.4-38.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:9podman-docker6:5.8.2-8.el9_8ALSA-2026:90362
AlmaLinux:8podman-gvproxy4:4.9.4-38.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:8podman-plugins4:4.9.4-38.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:9podman-plugins6:5.8.2-8.el9_8ALSA-2026:90362
AlmaLinux:10podman-remote7:5.8.2-11.el10_2.alma.1ALSA-2026:88336
AlmaLinux:8podman-remote4:4.9.4-38.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:9podman-remote6:5.8.2-8.el9_8ALSA-2026:90362
AlmaLinux:10podman-tests7:5.8.2-11.el10_2.alma.1ALSA-2026:88336
AlmaLinux:8podman-tests4:4.9.4-38.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:9podman-tests6:5.8.2-8.el9_8ALSA-2026:90362
AlmaLinux:8python3-criu3.18-5.module_el8.10.0+4120+03ad4b47ALSA-2026:89760
AlmaLinux:8python3-criu3.18-5.module_el8.10.0+3845+87b84552ALSA-2026:89760
AlmaLinux:8python3-criu3.18-5.module_el8.10.0+3901+4b80ecd7ALSA-2026:89760
AlmaLinux:8python3-criu3.18-5.module_el8.10.0+4047+545787c4ALSA-2026:89760
AlmaLinux:8python3-podman4.9.0-3.module_el8.10.0+4016+efd18bf8ALSA-2026:89760
AlmaLinux:8runc4:1.2.9-9.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:10skopeo2:1.22.2-6.el10_2ALSA-2026:89761
AlmaLinux:8skopeo2:1.14.6-5.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:9skopeo2:1.22.2-9.el9_8ALSA-2026:90462
AlmaLinux:10skopeo-tests2:1.22.2-6.el10_2ALSA-2026:89761
AlmaLinux:8skopeo-tests2:1.14.6-5.module_el8.10.0+4327+ab8e4068ALSA-2026:89760
AlmaLinux:9skopeo-tests2:1.22.2-9.el9_8ALSA-2026:90462
AlmaLinux:8slirp4netns1.2.3-1.module_el8.10.0+4082+f7f0c95eALSA-2026:89760
AlmaLinux:8slirp4netns1.2.3-1.module_el8.10.0+3901+4b80ecd7ALSA-2026:89760
AlmaLinux:8slirp4netns1.2.3-1.module_el8.10.0+4023+db236c53ALSA-2026:89760
AlmaLinux:8slirp4netns1.2.3-1.module_el8.10.0+3845+87b84552ALSA-2026:89760
AlmaLinux:8toolbox0.0.99.5.1-1.module_el8.10.0+4120+03ad4b47ALSA-2026:89760
AlmaLinux:8toolbox-tests0.0.99.5.1-1.module_el8.10.0+4120+03ad4b47ALSA-2026:89760
AlmaLinux:8udica0.2.6-21.module_el8.10.0+4068+0e21408fALSA-2026:89760
Alpine:v3.24go1.26.9-r0ALPINE-CVE-2026-78667
Debian:12golang-1.19no fix listedDEBIAN-CVE-2026-78667
Debian:13golang-1.24no fix listedDEBIAN-CVE-2026-78667
Debian:14golang-1.261.26.9-1DEBIAN-CVE-2026-78667
Debian:14golang-1.271.27.2-1DEBIAN-CVE-2026-78667
Gostdlib1.26.9, 1.27.2GO-2026-6609
Rocky Linux:8aardvark-dns2:1.10.1-2.module+el8.10.0+2001+6a33db9fRLSA-2026:89760
Rocky Linux:8aardvark-dns2:1.10.1-2.module+el8.10.0+40133+32c21f88RLSA-2026:89760
Rocky Linux:8aardvark-dns2:1.10.1-2.module+el8.10.0+1874+ce489889RLSA-2026:89760
Rocky Linux:8aardvark-dns2:1.10.1-2.module+el8.10.0+1880+8e896d1bRLSA-2026:89760
Rocky Linux:8aardvark-dns2:1.10.1-2.module+el8.10.0+1896+b18fa106RLSA-2026:89760
Rocky Linux:8aardvark-dns2:1.10.1-2.module+el8.10.0+1948+4b5cd4a9RLSA-2026:89760
Rocky Linux:8aardvark-dns2:1.10.1-2.module+el8.10.0+40047+0c0a73f4RLSA-2026:89760
Rocky Linux:10buildah2:1.43.1-7.el10_2RLSA-2026:88262
Rocky Linux:9buildah2:1.43.4-2.el9_8RLSA-2026:90424
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+1843+6892ab28RLSA-2026:89760
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+40133+32c21f88RLSA-2026:89760
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+1872+2e18eb19RLSA-2026:89760
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+40047+0c0a73f4RLSA-2026:89760
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+2001+6a33db9fRLSA-2026:89760
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+1948+4b5cd4a9RLSA-2026:89760
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+1815+5fe7415eRLSA-2026:89760
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+1874+ce489889RLSA-2026:89760
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+1896+b18fa106RLSA-2026:89760
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+1880+8e896d1bRLSA-2026:89760
Rocky Linux:8cockpit-podman0:84.1-1.module+el8.10.0+1825+623b0c20RLSA-2026:89760
Rocky Linux:8container-selinux2:2.229.0-3.module+el8.10.0+40223+e940a224RLSA-2026:89760
Rocky Linux:8containers-common2:1-82.module+el8.10.0+2001+6a33db9fRLSA-2026:89760
Rocky Linux:8containers-common2:1-82.module+el8.10.0+40047+0c0a73f4RLSA-2026:89760
Rocky Linux:8containers-common2:1-82.module+el8.10.0+40133+32c21f88RLSA-2026:89760
Rocky Linux:8containers-common2:1-82.module+el8.10.0+1843+6892ab28RLSA-2026:89760
Rocky Linux:8containers-common2:1-82.module+el8.10.0+1872+2e18eb19RLSA-2026:89760
Rocky Linux:8containers-common2:1-82.module+el8.10.0+1874+ce489889RLSA-2026:89760
Rocky Linux:8containers-common2:1-82.module+el8.10.0+1880+8e896d1bRLSA-2026:89760
Rocky Linux:8containers-common2:1-82.module+el8.10.0+1896+b18fa106RLSA-2026:89760
Rocky Linux:8containers-common2:1-82.module+el8.10.0+1948+4b5cd4a9RLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+1880+8e896d1bRLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+1815+5fe7415eRLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+1896+b18fa106RLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+1825+623b0c20RLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+1948+4b5cd4a9RLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+2001+6a33db9fRLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+1843+6892ab28RLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+40047+0c0a73f4RLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+1872+2e18eb19RLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+40133+32c21f88RLSA-2026:89760
Rocky Linux:8criu0:3.18-5.module+el8.10.0+1874+ce489889RLSA-2026:89760
Rocky Linux:8crun0:1.14.3-4.module+el8.10.0+40310+c25440c1RLSA-2026:89760
Rocky Linux:10delve0:1.26.1-3.el10_2RLSA-2026:95519
Rocky Linux:8delve0:1.26.1-1.module+el8.10.0+40244+e7cb3ff8RLSA-2026:86203
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+1874+ce489889RLSA-2026:89760
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+1896+b18fa106RLSA-2026:89760
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+1948+4b5cd4a9RLSA-2026:89760
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+2001+6a33db9fRLSA-2026:89760
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+40047+0c0a73f4RLSA-2026:89760
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+1815+5fe7415eRLSA-2026:89760
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+40133+32c21f88RLSA-2026:89760
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+1825+623b0c20RLSA-2026:89760
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+1843+6892ab28RLSA-2026:89760
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+1872+2e18eb19RLSA-2026:89760
Rocky Linux:8fuse-overlayfs0:1.13-1.module+el8.10.0+1880+8e896d1bRLSA-2026:89760
Rocky Linux:10golang0:1.26.10-1.el10_2RLSA-2026:86093
Rocky Linux:9golang0:1.26.10-1.el9_8RLSA-2026:86196
Rocky Linux:10golang-github-openprinting-ipp-usb0:0.9.27-7.el10_2.4RLSA-2026:88280
Rocky Linux:8grafana0:9.2.10-36.el8_10RLSA-2026:88188
Rocky Linux:9grafana0:10.2.6-23.el9_8.7RLSA-2026:89744
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+40047+0c0a73f4RLSA-2026:89760
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+1896+b18fa106RLSA-2026:89760
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+40133+32c21f88RLSA-2026:89760
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+1815+5fe7415eRLSA-2026:89760
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+1825+623b0c20RLSA-2026:89760
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+1843+6892ab28RLSA-2026:89760
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+1880+8e896d1bRLSA-2026:89760
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+1874+ce489889RLSA-2026:89760
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+1872+2e18eb19RLSA-2026:89760
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+2001+6a33db9fRLSA-2026:89760
Rocky Linux:8libslirp0:4.4.0-2.module+el8.10.0+1948+4b5cd4a9RLSA-2026:89760
Rocky Linux:8netavark2:1.10.3-1.module+el8.10.0+1874+ce489889RLSA-2026:89760
Rocky Linux:8netavark2:1.10.3-1.module+el8.10.0+1896+b18fa106RLSA-2026:89760
Rocky Linux:8netavark2:1.10.3-1.module+el8.10.0+1948+4b5cd4a9RLSA-2026:89760
Rocky Linux:8netavark2:1.10.3-1.module+el8.10.0+2001+6a33db9fRLSA-2026:89760
Rocky Linux:8netavark2:1.10.3-1.module+el8.10.0+1815+5fe7415eRLSA-2026:89760

Affected products (as reported)

VendorProductVersions
Go standard library net/http 0 – before 1.26.91.27.0-0 – before 1.27.2

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References