CVE-2026-78667
Public on 2026-10-08
Modified on 2026-10-10
Description
When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) could consume an excessive amount of CPU.
These functions now ignore Range headers containing more than 200 ranges.
The limit is controlled by the new httpservecontentmaxranges=GODEBUG setting. Setting GODEBUG=httpservecontentmaxranges=0 disables the limit.
NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9
NOTE: https://github.com/golang/go/issues/81858
NOTE: Fixed by: https://github.com/golang/go/commit/ababc3cd873d8acce1777268aa7a817e6b672028 (go1.27.2)
NOTE: Fixed by: https://github.com/golang/go/commit/eb25b4e532c5a01f99ef860ec66743a8783f992b (go1.26.9)
These functions now ignore Range headers containing more than 200 ranges.
The limit is controlled by the new httpservecontentmaxranges=GODEBUG setting. Setting GODEBUG=httpservecontentmaxranges=0 disables the limit.
NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9
NOTE: https://github.com/golang/go/issues/81858
NOTE: Fixed by: https://github.com/golang/go/commit/ababc3cd873d8acce1777268aa7a817e6b672028 (go1.27.2)
NOTE: Fixed by: https://github.com/golang/go/commit/eb25b4e532c5a01f99ef860ec66743a8783f992b (go1.26.9)
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | amazon-cloudwatch-agent | Not Affected | ||
| Amazon Linux 2023 | amazon-cloudwatch-agent | Not Affected | ||
| Amazon Linux 2 - Docker Extra | amazon-ecr-credential-helper | 2026-10-24 | ALAS2DOCKER-2026-149 | Fixed |
| Amazon Linux 2 - Ecs Extra | amazon-ecr-credential-helper | 2026-10-24 | ALAS2ECS-2026-146 | Fixed |
| Amazon Linux 2 - Aws-nitro-enclaves-cli Extra | amazon-ecr-credential-helper | 2026-10-24 | ALAS2NITRO-ENCLAVES-2026-126 | Fixed |
| Amazon Linux 2023 | amazon-ecr-credential-helper | 2026-10-24 | ALAS2023-2026-3271 | Fixed |
| Amazon Linux 2027 Preview | amazon-ecr-credential-helper | 2026-10-26 | ALAS2027-2026-234 | Fixed |
| Amazon Linux 2 - Core | amazon-ssm-agent | Not Affected | ||
| Amazon Linux 2023 | amazon-ssm-agent | Not Affected | ||
| Amazon Linux 2023 | buildah | 2026-10-24 | ALAS2023-2026-3256 | Fixed |
| Amazon Linux 2027 Preview | buildah | Pending Fix | ||
| Amazon Linux 2 - Core | cni-plugins | 2026-10-24 | ALAS2-2026-4017 | Fixed |
| Amazon Linux 2023 | cni-plugins | 2026-10-24 | ALAS2023-2026-3258 | Fixed |
| Amazon Linux 2027 Preview | cni-plugins | Pending Fix | ||
| Amazon Linux 2 - Aws-nitro-enclaves-cli Extra | containerd | Not Affected | ||
| Amazon Linux 2 - Docker Extra | containerd | Not Affected | ||
| Amazon Linux 2 - Ecs Extra | containerd | Not Affected | ||
| Amazon Linux 2023 | containerd | Not Affected | ||
| Amazon Linux 2023 | credentials-fetcher | Not Affected | ||
| Amazon Linux 2 - Core | cri-tools | 2026-10-24 | ALAS2-2026-4042 | Fixed |
| Amazon Linux 2 - Docker Extra | docker | 2026-10-24 | ALAS2DOCKER-2026-152 | Fixed |
| Amazon Linux 2 - Ecs Extra | docker | 2026-10-24 | ALAS2ECS-2026-148 | Fixed |
| Amazon Linux 2 - Aws-nitro-enclaves-cli Extra | docker | 2026-10-24 | ALAS2NITRO-ENCLAVES-2026-124 | Fixed |
| Amazon Linux 2023 | docker | 2026-10-24 | ALAS2023-2026-3266 | Fixed |
| Amazon Linux 2027 Preview | docker | 2026-10-26 | ALAS2027-2026-237 | Fixed |
| Amazon Linux 2 - Ecs Extra | ecs-init | Not Affected | ||
| Amazon Linux 2023 | ecs-init | Not Affected | ||
| Amazon Linux 2023 | git-lfs | 2026-10-24 | ALAS2023-2026-3322 | Fixed |
| Amazon Linux 2027 Preview | git-lfs | Pending Fix | ||
| Amazon Linux 2 - Golang1.11 Extra | golang | No Fix Planned | ||
| Amazon Linux 2 - Golang1.19 Extra | golang | No Fix Planned | ||
| Amazon Linux 2 - Golang1.9 Extra | golang | No Fix Planned | ||
| Amazon Linux 2 - Core | golang | 2026-10-24 | ALAS2-2026-4005 | Fixed |
| Amazon Linux 2023 | golang | 2026-10-24 | ALAS2023-2026-3225 | Fixed |
| Amazon Linux 2027 Preview | golang | 2026-10-26 | ALAS2027-2026-210 | Fixed |
| Amazon Linux 2023 | libcap | 2026-10-24 | ALAS2023-2026-3255 | Fixed |
| Amazon Linux 2027 Preview | libcap | Pending Fix | ||
| Amazon Linux 2 - Core | nerdctl | Not Affected | ||
| Amazon Linux 2023 | nerdctl | Not Affected | ||
| Amazon Linux 2 - Docker Extra | oci-add-hooks | 2026-10-24 | ALAS2DOCKER-2026-150 | Fixed |
| Amazon Linux 2 - Ecs Extra | oci-add-hooks | 2026-10-24 | ALAS2ECS-2026-147 | Fixed |
| Amazon Linux 2 - Aws-nitro-enclaves-cli Extra | oci-add-hooks | 2026-10-24 | ALAS2NITRO-ENCLAVES-2026-127 | Fixed |
| Amazon Linux 2023 | oci-add-hooks | 2026-10-24 | ALAS2023-2026-3272 | Fixed |
| Amazon Linux 2027 Preview | oci-add-hooks | 2026-10-26 | ALAS2027-2026-222 | Fixed |
| Amazon Linux 2 - Core | rclone | Not Affected | ||
| Amazon Linux 2023 | rclone | Not Affected | ||
| Amazon Linux 2 - Docker Extra | runfinch-finch | Not Affected | ||
| Amazon Linux 2023 | runfinch-finch | Not Affected | ||
| Amazon Linux 2023 | skopeo | 2026-10-24 | ALAS2023-2026-3254 | Fixed |
| Amazon Linux 2027 Preview | skopeo | Pending Fix | ||
| Amazon Linux 2 - Docker Extra | soci-snapshotter | 2026-10-24 | ALAS2DOCKER-2026-148 | Fixed |
| Amazon Linux 2023 | soci-snapshotter | 2026-10-24 | ALAS2023-2026-3270 | Fixed |
| Amazon Linux 2027 Preview | soci-snapshotter | 2026-10-26 | ALAS2027-2026-236 | Fixed |
| Amazon Linux 2023 | yq | 2026-10-24 | ALAS2023-2026-3257 | Fixed |
| Amazon Linux 2027 Preview | yq | Pending Fix |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |