CVE-2026-33732: h3js srvx · Use of Incorrectly-Resolved Name or Reference
Affects h3js srvxSource CVE Database V5
Not known to be exploited · CVSS 4.8 Medium : upgrade to 0.11.13 when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 17% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 0.11.13
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 26 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade srvx and h3js/srvx to 0.11.13.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| h3jssrvx | Affected
| Fixed in
|
GitHubh3js/srvxpkg:github/h3js/srvxOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade srvx to version 0.11.13 or later, where the FastURL constructor has been updated to use the native URL parser for non-root-relative strings, eliminating the pathname parsing discrepancy. No additional mitigation steps are indicated.
Description
A vulnerability in h3js srvx versions prior to 0.11.13 allows middleware bypass due to a pathname parsing discrepancy in the FastURL constructor. This occurs when a raw HTTP request uses an absolute URI with a non-standard scheme such as file://. The issue is resolved starting in version 0.11.13 by changing FastURL to use the native URL constructor for strings not starting with '/'. The CVSS score is 4.8, indicating medium severity.