CVE-2025-5399

HIGH EPSS 65.1%
Published Jun 7, 20251y ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Jun 7, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

Due to a mistake in libcurl's WebSocket code, a malicious server can send a particularly crafted packet which makes libcurl get trapped in an endless busy-loop. There is no other way for the application to escape or exit this loop other than killing the thread/process. This might be used to DoS libcurl-using application.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
65.1% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-835

Affected Products 1

VendorProductVersionRange
haxxcurl*≥8.13.0  –  <8.14.1

References 4

  • openwall.com http://www.openwall.com/lists/oss-security/2025/06/04/2
    Mailing ListThird Party Advisory
  • curl.se https://curl.se/docs/CVE-2025-5399.html
    Vendor Advisory
  • curl.se https://curl.se/docs/CVE-2025-5399.json
    Vendor Advisory
  • hackerone.com https://hackerone.com/reports/3168039
    ExploitIssue TrackingThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.