CVE-2026-48154 pilinux CVE debrief

Who should care

Developers and administrators using GoRest versions prior to 1.12.2 should be aware of this vulnerability and take steps to patch their systems. Additionally, security teams monitoring for potential crashes and attackers exploiting this vulnerability should be informed.

Technical summary

The GoRest library, a Golang starter kit for building RESTful APIs with the Gin framework, contains a race condition vulnerability in its nMemorySecret2FA implementation prior to version 1.12.2. This vulnerability arises from the use of an unsynchronized package-level map to store 2FA secrets, which can be concurrently read from and written to by multiple HTTP handlers in handler/login.go and handler/twoFA.go. When exploited, this condition causes Go's runtime to treat the concurrent map access as an unrecoverable fatal error, allowing an attacker to repeatedly trigger process crashes on demand. This results in a high availability impact without compromising confidentiality or integrity.

Defensive priority

This vulnerability has a medium CVSS score of 5.9 and can cause high availability impact. To address this vulnerability, prioritize patching to prevent potential crashes due to unsynchronized concurrent map access.

Recommended defensive actions

• Patch GoRest to version 1.12.2 or later to fix the race condition vulnerability.
• Implement compensating controls to detect and respond to potential crashes caused by unsynchronized map access.
• Monitor the system for repeated crashes and adjust defensive measures as necessary.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE-2026-48154 issue arises from a race condition in GoRest versions prior to 1.12.2, specifically in the nMemorySecret2FA implementation. This condition is caused by an unsynchronized package-level map used for storing 2FA secrets, which can be concurrently accessed and written by multiple HTTP handlers. Because Go's runtime treats such unsynchronized concurrent map access as a fatal error, an attacker can exploit this vulnerability to crash the process repeatedly, leading to high availability impact without affecting confidentiality or integrity.

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.