CVE-2026-12766 IBM CVE debrief

Who should care

Defenders responsible for systems using IBM Langflow OSS versions 1.0.0 through 1.11.2 should assess exposure and potential impact. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify exposure, apply patches or mitigations, and monitor systems for suspicious activity. The vulnerability's potential impact on network enumeration and facilitation of other attacks requires prompt attention and

Why it matters

Defenders should care about this vulnerability because it may allow authenticated attackers to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks. Systems using IBM Langflow OSS versions 1.0.0 through 1.11.2 are affected, and defenders should verify exposure and assess potential impact.

• Network enumeration may be possible
• Facilitation of other attacks may occur
• Verification of exposure is necessary
• Patching or mitigation is recommended

Technical summary

IBM Langflow OSS versions 1.0.0 through 1.11.2 are vulnerable to server-side request forgery (SSRF). This vulnerability may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks. The vulnerability's technical details and defensive priorities are based on the CVE record and NVD entry, which provide source-grounded information for risk assessment and mitigation planning. Defenders should prioritize verifying exposure and assessing potential impact.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impact, focusing on systems using IBM Langflow OSS versions 1.0.0 through 1.11.2.

Recommended defensive actions

• Verify if systems using IBM Langflow OSS are exposed to the vulnerability
• Assess potential impact of SSRF attacks on network enumeration and other potential targets
• Apply patches or mitigations as recommended by the vendor
• Monitor systems 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

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. Defenders should verify exposure and assess potential impact, focusing on systems using IBM Langflow OSS versions 1.0.0 through 1.11.2. The official CVE Program record and NIST NVD detail page offer source-provided CVE metadata and vulnerability assessment. Additional verification tasks are necessary due to limited source detail.

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.