CVE-2026-56858
Vulnerability Summary
Timeline
Description
Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS.
CVSS Metrics
- v3.1•MEDIUM•Score: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS Trends
Current EPSS score: 0.31%• Percentile: 24%
Techniques & Countermeasures
- CWE-79•Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Affected Systems
- chainguard•aactl
< 0.4.12-r68
- chainguard•actions-runner-controller-fips
< 0
- chainguard•addon-resizer
< 0
- chainguard•age
< 0
- chainguard•age-fips
< 0
- chainguard•agentbeat-fips
< 9.2.7-r21
- chainguard•amass
< 5.1.1-r12
- chainguard•amazon-cloudwatch-agent
< 1.300072.0-r1
- chainguard•amazon-cloudwatch-agent-amazon-cloudwatch-agent-config-wizard
< 0
- chainguard•amazon-cloudwatch-agent-amazon-cloudwatch-agent-config-wizard-fips
< 0
- chainguard•amazon-cloudwatch-agent-config-downloader
< 0
- chainguard•amazon-cloudwatch-agent-config-downloader-fips
< 0
- chainguard•amazon-cloudwatch-agent-config-translator
< 0
- chainguard•amazon-cloudwatch-agent-config-translator-fips
< 0
- chainguard•amazon-cloudwatch-agent-fips
< 1.300072.0-r1
- chainguard•amazon-cloudwatch-agent-operator
< 3.7.0-r1
- chainguard•amazon-cloudwatch-agent-start-amazon-cloudwatch-agent
< 0
- chainguard•amazon-cloudwatch-agent-start-amazon-cloudwatch-agent-fips
< 0
- chainguard•amazon-ecs-agent-fips
< 1.106.0-r3 | < 0
- chainguard•amazon-ecs-cni-plugins
< 0
- chainguard•amazon-ecs-cni-plugins-fips
< 0
- chainguard•amazon-eks-ami-fips
< 0
- chainguard•amazon-k8s-cni
< 1.23.0-r1 | < 0
- chainguard•amazon-k8s-cni-fips
< 0 | < 1.23.0-r1
- chainguard•amazon-k8s-cni-init
< 0
- chainguard•amazon-k8s-cni-init-fips
< 0
- chainguard•amazon-k8s-cni-init-fips-compat
< 1.23.0-r1 | < 0
- chainguard•amazon-ssm-agent
< 3.3.4851.0-r3 | < 0
- chainguard•amazon-ssm-agent-ecs-exec
< 0 | < 3.3.4851.0-r3
- chainguard•amazon-ssm-agent-ecs-exec-fips
< 0 | < 3.3.4851.0-r3
- chainguard•amazon-ssm-agent-fips
< 0 | < 3.3.4851.0-r3
- chainguard•amazon-vpc-cni-plugins
< 0
- chainguard•ansible-operator
< 1.42.3-r10
- chainguard•ansible-operator-fips
< 1.42.3-r7
- chainguard•apache-beam-java-11-sdk
< 2.75.0-r2
- chainguard•apache-beam-java-17-sdk
< 2.75.0-r2
- chainguard•apache-beam-java-21-sdk
< 2.75.0-r2
- chainguard•apache-beam-python-3.13-sdk
< 2.75.0-r5
- chainguard•apache-beam-python-3.14-sdk
< 2.75.0-r2
- chainguard•apiserver-network-proxy-0.35
< 0.35.0-r4
- chainguard•apiserver-network-proxy-0.35-agent
< 0.35.0-r4
- chainguard•apiserver-network-proxy-0.36
< 0.36.0-r4
- chainguard•apiserver-network-proxy-0.36-agent
< 0.36.0-r4
- chainguard•apiserver-network-proxy-fips-0.34
< 0.34.0-r8
- chainguard•apiserver-network-proxy-fips-0.34-agent
< 0.34.0-r8
- chainguard•apiserver-network-proxy-fips-0.35
< 0.35.0-r7
- chainguard•apiserver-network-proxy-fips-0.35-agent
< 0.35.0-r7
- chainguard•apiserver-network-proxy-fips-0.36
< 0.36.0-r9
- chainguard•apiserver-network-proxy-fips-0.36-agent
< 0.36.0-r9
- chainguard•apko-fips
< 1.2.36-r1
Showing first 50 affected entries in server-rendered view.
References (8)
- https://go.dev/issue/80435
- https://go.dev/cl/807100
- https://groups.google.com/g/golang-announce/c/94pEornpRlI
- https://pkg.go.dev/vuln/GO-2026-6091
- https://security-tracker.debian.org/tracker/CVE-2026-56858
- https://ubuntu.com/security/CVE-2026-56858
- https://www.cve.org/CVERecord?id=CVE-2026-56858
- https://github.com/golang/go/issues/80435