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CVE-2021-3810

24
FAUCET Score

CVE-2021-3810 describes an Inefficient Regular Expression Complexity vulnerability affecting coder code-server. This flaw carries a CVSS score of 7.5 (HIGH), indicating a network-exploitable vulnerability with low attack complexity that can lead to high availability impact. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.12.0CPE matchmatch criteria
cpe:2.3:a:coder:code-server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/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 Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.26%
Probability of exploitation in next 30 days
EPSS Percentile
66.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0126 is in the 46th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: code-serverFixed in: 3.12.0

Vendor Advisories (1)

npmGHSA-49x3-8228-3w3mhigh

Inefficient Regular Expression Complexity in code-server

Sep 20, 2021

References

github.com / cdr/code-server/commit/ca617df135e78833f93c8320cb2d2cf8bba809f5
PatchThird Party Advisory
huntr.dev / bounties/38888513-30fc-4d8f-805d-34070d60e223
ExploitIssue TrackingPatchThird Party Advisory