How severe is CVE-2026-33732?

CVE-2026-33732 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-33732 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33732?

CVE-2026-33732 affects H3 Srvx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33732?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33732 have an EU (EUVD) identifier?

Yes. CVE-2026-33732 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16291.

When was CVE-2026-33732 published?

CVE-2026-33732 was published on 2026-03-26 and last updated on 2026-06-17.

CVE-2026-33732

CVE-2026-33732 is a medium-severity vulnerability in H3 Srvx with a CVSS 3.x base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-706.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16291
Weakness: CWE-706
Affected product: H3 Srvx
Published: 2026-03-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-33732?: 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.
How severe is CVE-2026-33732?: CVE-2026-33732 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-33732 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33732?: CVE-2026-33732 affects H3 Srvx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33732?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33732 have an EU (EUVD) identifier?: Yes. CVE-2026-33732 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16291.
When was CVE-2026-33732 published?: CVE-2026-33732 was published on 2026-03-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:h3:srvx:*:*:*:*:*:node.js:*:*

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