CVE-2026-117680 lud CVE debrief

Who should care

Defenders responsible for systems using lud jsv should assess exposure and prioritize updates to 0.26.2 or later. This includes verifying affected versions, reviewing schema validation configurations, and checking for potential bypasses. Operators, platform administrators, vulnerability management teams, and security teams should be aware of the vulnerability and its potential impact on their systems.

Why it matters

CVE-2026-117680 is a low-severity vulnerability in lud jsv that allows an unauthenticated remote attacker to bypass schema validation. Defenders should prioritize verifying affected versions and updating to 0.26.2 or later.

• Verify schema validation configurations to prevent potential bypass
• Update jsv to version 0.26.2 or later to fix the vulnerability

Technical summary

The vulnerability in lud jsv allows an unauthenticated remote attacker to bypass schema validation via a string that matches a schema regex only after heavy backtracking. This issue affects jsv versions from 0.1.0 before 0.26.2. The attacker controls the data, not the schema, and linear patterns never exhaust the budget. Only schemas whose regex explores a catastrophic branch before the branch that matches are affected. Defenders should prioritize verifying affected versions and updating to 0.26.2 or later. The CVE record and NVD entry provide details on the vulnerability.

Defensive priority

Defenders should prioritize verifying affected versions and updating to 0.26.2 or later.

Recommended defensive actions

• Verify if the used jsv version is prior to 0.26.2
• Update jsv to version 0.26.2 or later
• Review schema validation configurations
• 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.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but the corpus lacks information on actual exploitation or victim impact. Defenders should verify affected versions and update to 0.26.2 or later. Additional verification tasks include reviewing schema validation configurations and checking for potential bypasses. The vulnerability allows an unauthenticated remote attacker to bypass schema validation via a string that matches a schema regex only after heavy backtracking.

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.