Vulnerability in Deno
CVE-2023-26103
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.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
EPSS: 0.012 (65.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Deno
- N/a Deno — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- report@snyk.io (Technical Description, Exploit, Third Party Advisory)
- report@snyk.io (Broken Link)
- report@snyk.io (Patch)
- report@snyk.io (Patch)
- report@snyk.io (Release Notes)
Frequently asked questions
- What is CVE-2023-26103?
- CVE-2023-26103 is a medium-severity vulnerability in Deno, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2023-02-25.
- How severe is CVE-2023-26103?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-26103 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.