CVE-2026-116215 maccmspro CVE debrief

Who should care

Defenders responsible for MacCMS v10 installations should assess the potential impact of this vulnerability on their systems and prioritize verification and mitigation efforts. This includes operators, platform administrators, vulnerability management teams, and security teams who need to ensure that their environments are protected against this race condition vulnerability. They should verify the presence of MacCMS v10 through 2026.1000.4056 in their and

Why it matters

Defenders should care about CVE-2026-116215 because it allows authenticated members to exploit a race condition in MacCMS v10, potentially leading to unauthorized redemption of recharge cards and inflation of user_points.

• Potential inflation of user_points to buy VIP upgrades and paid content
• Ability for authenticated members to redeem one recharge card multiple times

Technical summary

The vulnerability exists in the Card::useData() function of MacCMS v10 through 2026.1000.4056. It allows authenticated members to redeem one recharge card multiple times by sending concurrent flag=card requests that pass the non-locking card read before it is marked used, potentially inflating user_points to buy VIP upgrades and paid content. This issue arises from the function's inability to properly handle multiple requests simultaneously, leading to a race condition that can be exploited by attackers. Defenders should prioritize verifying the presence of this vulnerability in their MacCMS v10 installations and assess the potential impact on their systems.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their MacCMS v10 installations and assess the potential impact on their systems.

Recommended defensive actions

• Verify the presence of MacCMS v10 through 2026.1000.4056 in your environment
• Assess the potential impact of the race condition vulnerability on your systems
• Implement measures to prevent concurrent flag=card requests from bypassing the locking mechanism
• Monitor for suspicious activity related to card redemption and user_points inflation
• 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

Evidence notes

The CVE record and source item provide details about the vulnerability, including its description, affected versions, and references to additional information. Defenders should verify the presence of MacCMS v10 through 2026.1000.4056 in their environment and assess the potential impact on their systems. The vulnerability exists in the Card::useData() function, allowing authenticated members to redeem one recharge card multiple times via concurrent flag=card requests. Evidence is limited to CVE and source-item data.

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.