CVE-2026-111874 OpenCATS CVE debrief

Who should care

Defenders responsible for OpenCATS deployments, particularly those using version 0.10.0, should assess exposure and verify the presence of the patch. They should also implement additional security measures at the network or web-server layer, such as rate limiting and monitoring, to mitigate potential exploitation attempts.

Why it matters

CVE-2026-111874 is a vulnerability in OpenCATS 0.10.0 that allows remote exploitation with high complexity and difficult exploitability. Defenders should prioritize verifying the presence of the patch and assessing exposure in their OpenCATS deployments.

• Verify authentication and rate limiting measures in OpenCATS deployments
• Assess exposure to remote exploitation attempts
• Implement additional security measures at the network or web-server layer

Technical summary

The vulnerability affects the Career Portal's processLogin function in modules/careers/CareersUI.php of OpenCATS 0.10.0. The manipulation of the applyToJobSubAction argument causes improper restriction of excessive authentication attempts, allowing remote exploitation with high complexity and difficult exploitability. The patch (1cf4fa3ee9054314b023be79d404078645c22ade) addresses this issue by requiring authentication and CAPTCHA completion for Career Portal access. Defenders should prioritize verifying the presence of the patch and assessing exposure in their OpenCATS deployments.

Defensive priority

Defenders should prioritize verifying the presence of the patch and assessing exposure in their OpenCATS deployments.

Recommended defensive actions

• Verify the presence of the patch (1cf4fa3ee9054314b023be79d404078645c22ade) in OpenCATS deployments
• Assess exposure in OpenCATS 0.10.0 deployments
• Implement additional authentication and rate limiting measures at the network or web-server layer
• 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 metadata indicate a vulnerability in OpenCATS 0.10.0 with a CVSS score of 2.9 and LOW severity. The exploit has been published, but its usage is not confirmed. Defenders should verify the presence of the patch and assess exposure in their OpenCATS deployments. The patch (1cf4fa3ee9054314b023be79d404078645c22ade) addresses the improper restriction of excessive authentication attempts in the Career Portal's processLogin function. Evidence is limited to CVE and NVD details.

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.