CVE-20XX-?
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CVE-2026-55655

5.0 MEDIUM 0.1% exploit odds Fix listed Other

What it is

A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack can compromise the confidentiality of forwarded X11 traffic, including sensitive window contents and input, and may allow some manipulation of the forwarded session.

At a glance

Exploitability
Can be exploited locally on the machine with a low-privilege account, but needs a user to act. High risk of data exposure.
Exploit odds
0.1% chance of exploitation in the next 30 days (EPSS).
Fix
A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

  1. PublishedDisclosed publicly on CVE.org and NVD
  2. Last updatedMost recent change to the record

Why it ranks here

Details

Published
Last modified
Exploit probability
0.1% · EPSS, next 30 days
Weakness
CWE-923
Record status
Modified

Affected

Attack profile CVSS 3.1 · 5.0

Attack vector
Local
Complexity
High
Privileges needed
Low
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Raw vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-55655.md and follow it. Check whether this project is affected by CVE-2026-55655. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record