Moderate severityNVD Advisory· Published Feb 25, 2023· Updated Mar 11, 2025
CVE-2023-26103
CVE-2023-26103
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
denocrates.io | >= 1.12.0, < 1.31.0 | 1.31.0 |
Affected products
2Patches
Vulnerability mechanics
References
9- github.com/advisories/GHSA-jc97-h3h9-7xh6ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2023-26103ghsaADVISORY
- github.com/denoland/deno/blob/2b247be517d789a37e532849e2e40b724af0918f/ext/http/01_http.jsghsaWEB
- github.com/denoland/deno/commit/cf06a7c7e672880e1b38598fe445e2c50b4a9d06ghsaWEB
- github.com/denoland/deno/pull/17722ghsaWEB
- github.com/denoland/deno/releases/tag/v1.31.0ghsaWEB
- github.com/denoland/deno/security/advisories/GHSA-jc97-h3h9-7xh6ghsaWEB
- security.snyk.io/vuln/SNYK-RUST-DENO-3315970ghsaWEB
- github.com/denoland/deno/blob/2b247be517d789a37e532849e2e40b724af0918f/ext/http/01_http.js%23L395-L409mitre
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