Description
When curl retrieves an HTTP response, it stores the incoming headers so that they can be accessed later via the libcurl headers API. However, curl did not have a limit in how many or how large headers it would accept in a response, allowing a malicious server to stream an endless series of headers and eventually cause curl to run out of heap memory.
CVSS Metrics
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- network
- Complexity
- low
- Privileges
- none
- User Action
- none
- Scope
- unchanged
- Confidentiality
- none
- Integrity
- none
- Availability
- high
- Weaknesses
- CWE-770CWE-770
Metadata
- Primary Vendor
- HAXX
- Published
- 9/15/2023
- Last Modified
- 12/2/2025
- Source
- NIST NVD
- Note: Verify all details with official vendor sources before applying patches.
Affected Products
haxx : curlfedoraproject : fedorafedoraproject : fedorafedoraproject : fedoramicrosoft : windows_10_1809microsoft : windows_10_21h2microsoft : windows_10_22h2microsoft : windows_11_21h2microsoft : windows_11_22h2microsoft : windows_11_23h2microsoft : windows_server_2019microsoft : windows_server_2022
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