CVE Details
CVE-2026-55255
Langflow Authorization Bypass Through User-Controlled Key Vulnerability
Published: 2026-07-07
CVSS: 9.9 CRITICAL
Product: Langflow Langflow
Due Date: 2026-07-10
Langflow contains an authorization bypass through user-controlled key vulnerability which allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request.
GitHub PoC
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FIRST EPSS
EPSS estimates the probability of exploitation in the next 30 days. Higher values indicate higher likelihood of real-world exploitation.
Timeline
CVE Stalker
KEV
MITRE
GitHub
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References
Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | cveId | CVE-2026-55255 |
| cveMetadata > | assignerOrgId | a0819718-46f1-4df5-94e2-005712e83aaa |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | assignerShortName | GitHub_M |
| cveMetadata > | dateReserved | 2026-06-16T16:44:00.625Z |
| cveMetadata > | datePublished | 2026-06-23T16:28:20.985Z |
| cveMetadata > | dateUpdated | 2026-07-07T17:54:17.107Z |
| containers > | cna > title | Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow |
| containers > | cna > problemTypes > 0 > descriptions > 0 > cweId | CWE-639 |
| containers > | cna > problemTypes > 0 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 0 > descriptions > 0 > description | CWE-639: Authorization Bypass Through User-Controlled Key |
| containers > | cna > problemTypes > 0 > descriptions > 0 > type | CWE |
| containers > | cna > metrics > 0 > cvssV3_1 > attackComplexity | LOW |
| containers > | cna > metrics > 0 > cvssV3_1 > attackVector | NETWORK |
| containers > | cna > metrics > 0 > cvssV3_1 > availabilityImpact | LOW |
| containers > | cna > metrics > 0 > cvssV3_1 > baseScore | 9.9 |
| containers > | cna > metrics > 0 > cvssV3_1 > baseSeverity | CRITICAL |
| containers > | cna > metrics > 0 > cvssV3_1 > confidentialityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > integrityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > privilegesRequired | LOW |
| containers > | cna > metrics > 0 > cvssV3_1 > scope | CHANGED |
| containers > | cna > metrics > 0 > cvssV3_1 > userInteraction | NONE |
| containers > | cna > metrics > 0 > cvssV3_1 > vectorString | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L |
| containers > | cna > metrics > 0 > cvssV3_1 > version | 3.1 |
| containers > | cna > references > 0 > name | https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2 |
| containers > | cna > references > 0 > tags > 0 | x_refsource_CONFIRM |
| containers > | cna > references > 0 > url | https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2 |
| containers > | cna > references > 1 > name | https://github.com/langflow-ai/langflow/pull/12832 |
| containers > | cna > references > 1 > tags > 0 | x_refsource_MISC |
| containers > | cna > references > 1 > url | https://github.com/langflow-ai/langflow/pull/12832 |
| containers > | cna > affected > 0 > vendor | langflow-ai |
| containers > | cna > affected > 0 > product | langflow |
| containers > | cna > affected > 0 > versions > 0 > version | < 1.9.2 |
| containers > | cna > affected > 0 > versions > 0 > status | affected |
| containers > | cna > providerMetadata > orgId | a0819718-46f1-4df5-94e2-005712e83aaa |
| containers > | cna > providerMetadata > shortName | GitHub_M |
| containers > | cna > providerMetadata > dateUpdated | 2026-06-23T16:28:20.985Z |
| containers > | cna > descriptions > 0 > lang | en |
| containers > | cna > descriptions > 0 > value | Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. This vulnerability is fixed in 1.9.2. |
| containers > | cna > source > advisory | GHSA-qrpv-q767-xqq2 |
| containers > | cna > source > discovery | UNKNOWN |
| containers > | adp > 0 > metrics > 0 > other > type | ssvc |
| containers > | adp > 0 > metrics > 0 > other > content > id | CVE-2026-55255 |
| containers > | adp > 0 > metrics > 0 > other > content > role | CISA Coordinator |
| containers > | adp > 0 > metrics > 0 > other > content > options > 0 > Exploitation | active |
| containers > | adp > 0 > metrics > 0 > other > content > options > 1 > Automatable | no |
| containers > | adp > 0 > metrics > 0 > other > content > options > 2 > Technical Impact | total |
| containers > | adp > 0 > metrics > 0 > other > content > version | 2.0.3 |
| containers > | adp > 0 > metrics > 0 > other > content > timestamp | 2026-07-07T17:45:10.476349Z |
| containers > | adp > 0 > references > 0 > url | https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2 |
| containers > | adp > 0 > references > 0 > tags > 0 | exploit |
| containers > | adp > 0 > references > 1 > url | https://webflow.sysdig.com/blog/understanding-langflow-cve-2026-55255-and-why-higher-cvss-vulnerabilities-arent-always-the-most-exploited |
| containers > | adp > 0 > references > 1 > tags > 0 | third-party-advisory |
| containers > | adp > 0 > references > 2 > url | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-55255 |
| containers > | adp > 0 > references > 2 > tags > 0 | government-resource |
| containers > | adp > 0 > title | CISA ADP Vulnrichment |
| containers > | adp > 0 > providerMetadata > orgId | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| containers > | adp > 0 > providerMetadata > shortName | CISA-ADP |
| containers > | adp > 0 > providerMetadata > dateUpdated | 2026-07-07T17:54:17.107Z |