CVE-2023-26103
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 1.2%
exploitation probability
1.2%top 34% of all CVEs
observed exploitation
nono source reports it
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 · denoReferences
https://github.com/denoland/deno/blob/2b247be517d789a37e532849e2e40b724af0918f/ext/http/01_http.js%23L395-L409https://github.com/denoland/deno/commit/cf06a7c7e672880e1b38598fe445e2c50b4a9d06https://github.com/denoland/deno/pull/17722https://github.com/denoland/deno/releases/tag/v1.31.0https://security.snyk.io/vuln/SNYK-RUST-DENO-3315970