CVE-2026-10650
Description
A flaw was found in libwebsockets, specifically within its SSH Protocol Handler component. A remote attacker can exploit this vulnerability by manipulating the 'msg_len' argument in the 'lws_ssh_parse_plaintext' function. This manipulation can lead to excessive resource consumption, resulting in a Denial of Service (DoS) condition for the affected system.
Mitigation
To mitigate this issue, restrict network access to systems running the libwebsockets SSH Protocol Handler to trusted clients only. If the SSH Protocol Handler functionality is not required, consider disabling or removing components that utilize it to reduce exposure. Consult product documentation for specific instructions on disabling or configuring the libwebsockets SSH Protocol Handler within your Red Hat product.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.3 | N/A | 5.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | Low | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Understanding the Weakness (CWE)
Confidentiality,Integrity
Technical Impact: Read Memory; Modify Memory; Varies by Context
Frequently Asked Questions
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