What is CVE-2026-44372?

CVE-2026-44372 is a medium-severity vulnerability in Nitro, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-05-13.

How severe is CVE-2026-44372?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in Nitro

CVE-2026-44372

Nitro is a next generation server toolkit. Prior to 3.0.260429-beta, an attacker could turn a redirect route rule using wildcards rewrite into a cross-host redirect by sliding an extra slash in after the rule prefix. This vulnerability is fixed in 3.0.260429-beta.

Vulnerability class: Open Redirect

Published 2026-05-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (29.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001

Affected products

Nitro
Nitrojs Nitro — versions < 3.0.260429-beta
Nitrojs Nitropack — versions < 2.13.4

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

github.com/nitrojs/nitro/pull/4236 (Patch, Issue Tracking)
github.com/nitrojs/nitro/releases/tag/v2.13.4 (Release Notes)
github.com/nitrojs/nitro/releases/tag/v3.0.260429-beta (Release Notes)
github.com/nitrojs/nitro/security/advisories/GHSA-9phm-9p8f-hw5m (Vendor Advisory)

Frequently asked questions

What is CVE-2026-44372?: CVE-2026-44372 is a medium-severity vulnerability in Nitro, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-05-13.
How severe is CVE-2026-44372?: Medium severity. CVSS v3 base score is 6.1 out of 10.