CVE-2026-4528 | trueleaf ApiFlow 0.9.7 URL Validation http_proxy.service.ts validateUrlSecurity server-side request forgery

VDB-352316 · CVE-2026-4528 · GCVE-100-352316 TRUELEAF APIFLOW 0.9.7 URL VALIDATION HTTP_PROXY.SERVICE.TS VALIDATEURLSECURITY SERVER-SIDE REQUEST FORGERY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.6 $0-$5k 1.98 Summaryinfo A vulnerability was found in trueleaf ApiFlow 0.9.7. It has been declared as critical. This affects the function validateUrlSecurity of the file packages/server/src/service/proxy/http_proxy.service.ts of the component URL Validation Handler. Such manipulation leads to server-side request forgery. This vulnerability is documented as CVE-2026-4528. The attack can be executed remotely. Additionally, an exploit exists. Detailsinfo A vulnerability, which was classified as critical, has been found in trueleaf ApiFlow 0.9.7. Affected by this issue is the function validateUrlSecurity of the file packages/server/src/service/proxy/http_proxy.service.ts of the component URL Validation Handler. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The advisory is shared for download at notion.so. This vulnerability is handled as CVE-2026-4528. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. The exploit is available at notion.so. It is declared as proof-of-concept. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Vendor trueleaf Name ApiFlow Version 0.9.7 CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.3 VulDB Meta Temp Score: 6.6 VulDB Base Score: 7.3 VulDB Temp Score: 6.6 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: Server-side request forgery CWE: CWE-918 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 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: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/21/2026 Advisory disclosed 03/21/2026 +0 days VulDB entry created 03/21/2026 +0 days VulDB entry last update Sourcesinfo Advisory: notion.so Status: Not defined CVE: CVE-2026-4528 (🔒) GCVE (CVE): GCVE-0-2026-4528 GCVE (VulDB): GCVE-100-352316 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/21/2026 08:41 Changes: 03/21/2026 08:41 (56) Complete: 🔍 Submitter: din4 Cache ID: 99:95E:101 Submitinfo Accepted Submit #784197: trueleaf apiflow ≤0.9.7 Server-Side Request Forgery (by din4) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸