CVE-2026-6414 | fastify static up to 9.1.0 url encoding (GHSA-x428-ghpx-8j92)

VDB-357918 · CVE-2026-6414 · GHSA-X428-GHPX-8J92 FASTIFY STATIC UP TO 9.1.0 URL ENCODING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.7 $0-$5k 1.87+ Summaryinfo A vulnerability categorized as problematic has been discovered in fastify static up to 9.1.0. Affected by this vulnerability is an unknown functionality. The manipulation results in url encoding. This vulnerability was named CVE-2026-6414. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component. Detailsinfo A vulnerability was found in fastify static up to 9.1.0. It has been classified as problematic. Affected is an unknown functionality. The manipulation with an unknown input leads to a url encoding vulnerability. CWE is classifying the issue as CWE-177. The product does not properly handle when all or part of an input has been URL encoded. This is going to have an impact on confidentiality. CVE summarizes: @fastify/static versions 8.0.0 through 9.1.0 decode percent-encoded path separators (%2F) before filesystem resolution, while Fastify's router treats them as literal characters. This mismatch allows attackers to bypass route-based middleware or guards that protect files served by @fastify/static. For example, a route guard on a protected path can be circumvented by encoding the path separator in the URL. Upgrade to @fastify/static 9.1.1 to fix this issue. There are no workarounds. The advisory is available at github.com. This vulnerability is traded as CVE-2026-6414 since 04/16/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. Upgrading to version 9.1.1 eliminates this vulnerability. Productinfo Vendor fastify Name static Version 9.0 9.1.0 CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.8 VulDB Meta Temp Score: 4.7 VulDB Base Score: 3.7 VulDB Temp Score: 3.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.9 CNA Vector (openjs): 🔒 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: Url encoding CWE: CWE-177 / CWE-172 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: static 9.1.1 Timelineinfo 04/16/2026 Advisory disclosed 04/16/2026 +0 days CVE reserved 04/16/2026 +0 days VulDB entry created 04/16/2026 +0 days VulDB entry last update Sourcesinfo Advisory: GHSA-x428-ghpx-8j92 Status: Confirmed CVE: CVE-2026-6414 (🔒) GCVE (CVE): GCVE-0-2026-6414 GCVE (VulDB): GCVE-100-357918 Entryinfo Created: 04/16/2026 15:49 Changes: 04/16/2026 15:49 (63) Complete: 🔍 Cache ID: 99:4DF:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸