CVSS 4.0
6.9 mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NCVE-2024-49767
Medium (6.9) in palletsprojects. EPSS 1.1% chance of exploitation in the next 30 days. Fixed in werkzeug 3.0.6.
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.
Severity
CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- EPSS
- 1.1% chance of exploitation in the next 30 days; higher than 65% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-400, CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Affected
- palletsprojects:quart
- palletsprojects:werkzeug
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-q34m-jh98-gwm2 | PyPI | werkzeug | >=2.0.0rc1 <3.0.6 | 3.0.6 |
| GHSA-q34m-jh98-gwm2 | PyPI | quart | <0.20.0 | 0.20.0 |
| PYSEC-2026-1860 | PyPI | quart | <0.20.0 | 0.20.0 |
| PYSEC-2026-3417 | PyPI | werkzeug | >=2.0.0rc1 <3.0.6 | 3.0.6 |
References
- https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee
- https://github.com/pallets/quart/commit/abb04a512496206de279225340ed022852fbf51f
- https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179b
- https://github.com/pallets/werkzeug/releases/tag/3.0.6
- https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2