CVE-2026-109403 conductor-oss CVE debrief

Who should care

Defenders of conductor-oss conductor deployments should assess exposure and prioritize patching or mitigation. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify affected versions and apply patches or mitigations.

Why it matters

Defenders should care about CVE-2026-109403 because it allows for server-side request forgery in conductor-oss conductor, potentially leading to unauthorized access, data breaches, or lateral movement within the network. Affected versions require verification and patching.

• Potential unauthorized access to internal resources
• Possible data breaches or modifications
• Risk of lateral movement within the network
• Need for verification of affected versions and patching

Technical summary

The vulnerability is in the function A2AService.getAgentCard of the file ai/src/main/java/org/conductoross/conductor/ai/a2a/A2AService.java, which can lead to server-side request forgery when manipulating the argument agentUrl. Affected by this vulnerability is the component Agent Card Fetching of conductor-oss conductor up to 3.32.5. The attack may be launched remotely and has been publicly disclosed. Defenders should prioritize verifying the affected versions of conductor-oss conductor and applying patches or mitigations to prevent exploitation.

Defensive priority

Defenders should prioritize verifying the affected versions of conductor-oss conductor and applying patches or mitigations to prevent exploitation.

Recommended defensive actions

• Verify the affected versions of conductor-oss conductor and apply patches or mitigations
• Restrict access to the affected component
• Monitor for suspicious activity
• 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 vulnerability was determined in conductor-oss conductor up to 3.32.5, specifically in the function A2AService.getAgentCard of the file ai/src/main/java/org/conductoross/conductor/ai/a2a/A2AService.java. The attack may be launched remotely and has been publicly disclosed. Defenders should verify affected versions and apply patches or mitigations.

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.