CVE-2026-50787 e-SIC Livre CVE debrief

Who should care

Defenders responsible for e-SIC Livre (esiclivre) v0.2.2 and earlier systems, including operators, platform administrators, vulnerability management teams, and security teams, should assess exposure and prioritize patching or mitigation to prevent denial of service attacks via excessive memory and CPU consumption.

Why it matters

CVE-2026-50787 is an uncontrolled resource consumption vulnerability in e-SIC Livre (esiclivre) v0.2.2 and earlier. Defenders should prioritize verifying the presence of this vulnerability in their systems and applying patches or mitigations to prevent denial of service attacks. The impact and remediation require verification from the supplied official sources.

• Denial of service via excessive memory consumption.
• Denial of service via excessive CPU consumption.
• Verification of system patch level is required.
• Remediation priority is high for systems using vulnerable CAPTCHA functionality.

Technical summary

The e-SIC Livre (esiclivre) v0.2.2 and earlier application contains an uncontrolled resource consumption vulnerability in restrito/inc/captcha.php. The application uses user-supplied parameters (l, a, tf, ql) without validation to generate CAPTCHA images, allowing remote attackers to cause denial of service via excessive memory and CPU consumption. This vulnerability affects systems using the vulnerable CAPTCHA functionality, and defenders should prioritize verifying the presence of this vulnerability in their systems and applying patches or mitigations.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their systems and applying patches or mitigations to prevent denial of service attacks.

Recommended defensive actions

• Verify the presence of this vulnerability in e-SIC Livre (esiclivre) v0.2.2 and earlier systems.
• Apply patches or mitigations to prevent denial of service attacks.
• Monitor systems for excessive memory and CPU consumption.
• 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 CVE record and source item provide details about the vulnerability in e-SIC Livre (esiclivre) v0.2.2 and earlier, specifically in restrito/inc/captcha.php. The impact and remediation require verification from the supplied official sources, such as CVE Program and NVD records. Defenders should verify the presence of this vulnerability in their systems and apply patches or mitigations to prevent denial of service attacks via excessive memory and CPU consumption.

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.