CVE-2026-118652 labstack CVE debrief

Who should care

Defenders responsible for systems using the github.com/labstack/echo package should assess exposure and prioritize remediation based on risk. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify exposure in their inventory and assess the impact of the vulnerability on their systems.

Why it matters

This CVE requires defenders to verify exposure in their inventory and assess the impact of the vulnerability on their systems. Affected versions and exploitation details require verification from official sources.

• Verify exposure in inventory to prevent potential XSS attacks
• Assess impact on systems to prioritize remediation
• Remediate vulnerable versions to prevent exploitation

Technical summary

The github.com/labstack/echo package is vulnerable to Cross-Site Scripting (XSS) via an unsanitized JSONP callback. This vulnerability requires verification of affected versions and exposure. The vulnerability requires defenders to verify exposure in their inventory and assess the impact of the vulnerability on their systems. Affected versions and exploitation details require verification from official sources. Defenders should prioritize verifying exposure in their inventory and assessing the impact of this vulnerability on their systems.

Defensive priority

Defenders should prioritize verifying exposure in their inventory and assessing the impact of this vulnerability on their systems.

Recommended defensive actions

• Verify exposure in inventory
• Assess impact on systems
• Prioritize remediation based on risk
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability is caused by an unsanitized JSONP callback in the github.com/labstack/echo package. Affected versions require verification from official sources. The github.com/labstack/echo package is vulnerable to Cross-Site Scripting (XSS) via an unsanitized JSONP callback. This vulnerability requires verification of affected versions and exposure. Defenders responsible for systems using the github.com/labstack/echo package should assess exposure and prioritize remediation based on risk.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.