CVE-2026-34538 | Apache Airflow up to 3.1.8 DagRun Wait Endpoint exposure of resource

VDB-356508 · CVE-2026-34538 · GCVE-0-2026-34538 APACHE AIRFLOW UP TO 3.1.8 DAGRUN WAIT ENDPOINT EXPOSURE OF RESOURCE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.0 $0-$5k 1.39+ Summaryinfo A vulnerability described as critical has been identified in Apache Airflow up to 3.1.8. This impacts an unknown function of the component DagRun Wait Endpoint. The manipulation results in exposure of resource. This vulnerability was named CVE-2026-34538. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended. Detailsinfo A vulnerability classified as critical has been found in Apache Airflow up to 3.1.8. Affected is an unknown code block of the component DagRun Wait Endpoint. The manipulation with an unknown input leads to a exposure of resource vulnerability. CWE is classifying the issue as CWE-668. The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes: Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security model documentation that defines the Viewer role as read-only. Airflow uses the FAB Auth Manager to manage access control on a per-resource basis. The Viewer role is intended to be read-only by default, and the security model documentation defines Viewer users as those who can inspect DAGs without accessing sensitive execution results. Users are recommended to upgrade to Apache Airflow 3.2.0 which resolves this issue. The weakness was presented by selen. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-34538 since 03/30/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/09/2026). Upgrading to version 3.2.0 eliminates this vulnerability. Productinfo Type Business Process Management Software Vendor Apache Name Airflow Version 3.1.0 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 License open-source Website Vendor: https://www.apache.org/ Product: https://github.com/apache/airflow/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Exposure of resource CWE: CWE-668 / CWE-200 / CWE-284 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Airflow 3.2.0 Timelineinfo 03/30/2026 CVE reserved 04/09/2026 +10 days Advisory disclosed 04/09/2026 +0 days VulDB entry created 04/09/2026 +0 days VulDB entry last update Sourcesinfo Vendor: apache.org Product: github.com Advisory: github.com Researcher: selen Status: Confirmed CVE: CVE-2026-34538 (🔒) GCVE (CVE): GCVE-0-2026-34538 GCVE (VulDB): GCVE-100-356508 Entryinfo Created: 04/09/2026 11:44 Changes: 04/09/2026 11:44 (56) Complete: 🔍 Cache ID: 99:1AD:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸