PT-2026-28517 · Srvx · Srvx

Hibwyli · Published 2026-03-26 · Updated 2026-03-26 · CVE-2026-33732

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions srvx versions prior to 0.11.13

Description srvx is a universal server based on web standards. A discrepancy in pathname parsing within srvx's FastURL component allows bypassing middleware on the Node.js adapter. This occurs when a raw HTTP request utilizes an absolute URI with a non-standard scheme, such as file://. Specifically, the issue arises because the FastURL constructor previously did not consistently resolve paths, leading to discrepancies between the paths seen by different middleware components. The vulnerability allows bypassing route-based middleware, including authentication guards and rate limiters. The issue is triggered when a request is sent with an absolute URI, and the req.url is set verbatim. The FastURL#getPos() function fails to correctly locate the pathname in such cases, leading to inconsistent path resolution.

Recommendations Update srvx to version 0.11.13 or later.

Exploit

Fix

Weakness Enumeration

CWE-706

Related Identifiers

CVE-2026-33732

GHSA-P36Q-Q72M-GCHR

Affected Products

Srvx

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33732.json · Exploit
• https://github.com/h3js/h3/security/advisories/GHSA-p36q-q72m-gchr · Vendor Advisory
• https://github.com/h3js/srvx/commit/de0d69901c357f36a39b7e13eebef6c930652baa · Patch
• https://osv.dev/vulnerability/CVE-2026-33732 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33732 · Security Note
• https://osv.dev/vulnerability/GHSA-p36q-q72m-gchr · Vendor Advisory
• https://github.com/h3js/srvx/releases/tag/v0.11.13 · Note
• https://github.com/h3js/srvx · Note
• https://twitter.com/CVEnew/status/2037280605042589776 · Twitter Post
• https://twitter.com/infoflowcloud/status/2037281294929793040 · Twitter Post
• https://twitter.com/cyberbivash/status/2037248637789503495 · Twitter Post