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CVE-2020-36406

27
FAUCET Score

CVE-2020-36406 describes a stack-based buffer overflow in uWebSockets versions 18.11.0 and 18.12.0, specifically within the uWS::TopicTree::trimTree function, impacting applications utilizing this library. This vulnerability carries a high CVSS score of 8.8, indicating a critical risk due to its network-based attack vector, low attack complexity, and potential for high impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
18.11.0CPE matchmatch criteria
cpe:2.3:a:uwebsockets_project:uwebsockets:18.11.0:*:*:*:*:node.js:*:*
18.12.0CPE matchmatch criteria
cpe:2.3:a:uwebsockets_project:uwebsockets:18.12.0:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.52%
Probability of exploitation in next 30 days
EPSS Percentile
72.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0152 is in the 71st percentile among its peer group of 14,855 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

bugs.chromium.org / p/oss-fuzz/issues/detail
ExploitIssue TrackingPatchThird Party Advisory
github.com / google/oss-fuzz-vulns/blob/main/vulns/uwebsockets/OSV-2020-1695.yaml
Third Party Advisory
github.com / uNetworking/uWebSockets/commit/03fca626a95130ab80f86adada54b29d27242759
PatchThird Party Advisory