CVE-2023-26103

CVSS 5.3 MEDIUMEPSS 1.2%CWE-1333

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 1.2%KEV nãoPoC —Patch —

Lifecycle

25 Feb 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Versions of the package deno before 1.31.0 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the upgradeWebSocket function, which contains regexes in the form of /s*,s*/, used for splitting the Connection/Upgrade header. A specially crafted Connection/Upgrade header can be used to significantly slow down a web socket server.

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

Affected products

n/a · deno

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References

https://github.com/denoland/deno/blob/2b247be517d789a37e532849e2e40b724af0918f/ext/http/01_http.js%23L395-L409 https://github.com/denoland/deno/commit/cf06a7c7e672880e1b38598fe445e2c50b4a9d06 https://github.com/denoland/deno/pull/17722 https://github.com/denoland/deno/releases/tag/v1.31.0 https://security.snyk.io/vuln/SNYK-RUST-DENO-3315970