9.3

CVE-2023-26114: coder code-server Missing Origin Validation in WebSockets

CVSS: 9.3v3.1CriticalModified
AliasesCGA-3qmc-7888-9chcCGA-gj29-p83p-mf23CGA-jg5m-427c-gr7x
Published 23-03-2023Last modified 25-02-2025
Open JSON

Vulnerability summary

CVE-2023-26114 is a critical (CVSS 9.3) Missing Origin Validation in WebSockets vulnerability in coder code-server. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 25.9% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.3/10
010
Critical · v3.1 (NVD)
EPSS score
0.34%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-MJ3M-XRM9-QV7G

Timeline

  1. 23-03-2023
    PublishedVulnerability first disclosed.
  2. 25-02-2025
    Last modifiedVulnerability information updated.

Description

Versions of the package code-server before 4.10.1 are vulnerable to Missing Origin Validation in WebSockets handshakes. Exploiting this vulnerability can allow an adversary in specific scenarios to access data from and connect to the code-server instance.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

26%

Versus all other CVEs

30-day change

0.00 pp

From 0.34% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.34%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • code-serverAll versions (No fix recorded)
  • code-server-compatAll versions (No fix recorded)
Wolfi2 products
  • code-serverAll versions (No fix recorded)
  • code-server-compatAll versions (No fix recorded)
Coder1 product
Npm1 product
  • code-server< 4.10.1

4 vendors · 6 products

References

6 links