CVE-2024-49767
Werkzeug possible resource exhaustion when parsing file data in forms
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | Medium6.9 | 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 |
| NVDNVD · Modified | 4.0 | Medium6.9 | 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:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 1.1% · top 34% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.9.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIQuartGHSA-q34m-jh98-gwm2 (opens in a new tab)
- PyPIWerkzeugGHSA-q34m-jh98-gwm2 (opens in a new tab)
References (6)
- https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee (opens in a new tab)x_refsource_MISC
- https://github.com/pallets/quart/commit/abb04a512496206de279225340ed022852fbf51f (opens in a new tab)x_refsource_MISC
- https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179b (opens in a new tab)x_refsource_MISC
- https://github.com/pallets/werkzeug/releases/tag/3.0.6 (opens in a new tab)x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20250103-0007/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-q34m-jh98-gwm2 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2024-49767)Record last updated .