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CVE-2026-33732: srvx is a universal server based on web standards

26
Routine
MEDIUM 4.8REMOTEUPGRADE

CVE-2026-33732 is a medium-severity flaw (CVSS 4.8) affecting srvx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

srvx is a universal server based on web standards. Prior to version 0.11.13, a pathname parsing discrepancy in srvx's `FastURL` allows middleware bypass on the Node.js adapter when a raw HTTP request uses an absolute URI with a non-standard scheme (e.g. `file://`). Starting in version 0.11.13, the `FastURL` constructor now deopts to native `URL` for any string not starting with `/`, ensuring consistent pathname resolution.

Why this priority

  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score4.8 (Medium)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionNone
EPSS exploit chance0.3% (top 83%)
CISA exploited listNo
WeaknessCWE-706
Published2026-03-26
Last modified2026-06-17
Publisher (CNA): GitHub, Inc. · Vendor: h3

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

h3 srvx UPGRADE
Affected: < 0.11.13
Fixed in: 0.11.13
Safe to downgrade to: no unaffected older release
1. Check installed version
npm ls srvx
2. UPGRADE to 0.11.13
npm install srvx@">=0.11.13"
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33732?

srvx: upgrade to 0.11.13. Exact commands for each OS are on this page.

Is CVE-2026-33732 being exploited?

CVE-2026-33732 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33732 affect?

CVE-2026-33732 affects srvx. Severity is medium (CVSS 4.8). srvx is a universal server based on web standards. Prior to version 0.11.13, a pathname parsing discrepancy in srvx's `FastURL` allows middleware bypass on the Node.js adapter when a raw HTTP request uses an absolute URI with a non-standard

How urgent is CVE-2026-33732?

Priority 26/100. Remotely exploitable, no login, no user action

Software pages

Node.js vulnerabilities

References

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