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Vulnerability record · CVE-2024-49767 · published 25 October 2024

CVE-2024-49767: Palletsprojects quart uncontrolled resource consumption vulnerability

PPalletsprojects · Quart

Werkzeug is a Web Server Gateway Interface web application library. Applications using `werkzeug.formparser.MultiPartParser` corresponding to a version of Werkzeug prior to 3.0.6 to parse `multipart/form-data` requests (e.g. all flask applications) are vulnerable to a relatively simple but effective resource exhaustion (denial of service) attack. A specifically crafted form submission request can cause the parser to allocate and block 3 to 8 times the upload size in main memory. There is no upper limit; a single upload at 1 Gbit/s can exhaust 32 GB of RAM in less than 60 seconds. Werkzeug version 3.0.6 fixes this issue.

6.9 CVSS 4.0 Medium EPSS 1.1% · top 35.8% CWE-400 · Uncontrolled resource consumptionCWE-770 · Allocation without limits
6.9CVSS 4.0 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

Werkzeug is a Web Server Gateway Interface web application library. Applications using `werkzeug.formparser.MultiPartParser` corresponding to a version of Werkzeug prior to 3.0.6 to parse `multipart/form-data` requests (e.g. all flask applications) are vulnerable to a relatively simple but effective resource exhaustion (denial of service) attack. A specifically crafted form submission request can cause the parser to allocate and block 3 to 8 times the upload size in main memory. There is no upper limit; a single upload at 1 Gbit/s can exhaust 32 GB of RAM in less than 60 seconds. Werkzeug version 3.0.6 fixes this issue.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee Patch
https://github.com/pallets/quart/commit/abb04a512496206de279225340ed022852fbf51f
https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179b Patch
https://github.com/pallets/werkzeug/releases/tag/3.0.6 Release Notes
https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2 Vendor Advisory
https://security.netapp.com/advisory/ntap-20250103-0007/

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2024-49767), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.