How severe is CVE-2026-44373?

CVE-2026-44373 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-44373 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44373?

CVE-2026-44373 affects Nitro. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44373?

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

Does CVE-2026-44373 have an EU (EUVD) identifier?

Yes. CVE-2026-44373 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30163.

When was CVE-2026-44373 published?

CVE-2026-44373 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-44373

CVE-2026-44373 is a medium-severity vulnerability in Nitro with a CVSS 3.x base score of 5.3. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30163
Weakness: CWE-22
Affected product: Nitro
Published: 2026-05-13
Last modified: 2026-06-17

Description

Nitro is a next generation server toolkit. Prior to 3.0.260429-beta, an attacker could bypass a proxy route rule by sending percent-encoded path traversal (..%2f) in the URL, causing Nitro to forward a request that the upstream resolved outside the configured scope. This vulnerability is fixed in 3.0.260429-beta.

Frequently asked questions

What is CVE-2026-44373?: Nitro is a next generation server toolkit. Prior to 3.0.260429-beta, an attacker could bypass a proxy route rule by sending percent-encoded path traversal (..%2f) in the URL, causing Nitro to forward a request that the upstream resolved outside the configured scope. This vulnerability is fixed in 3.0.260429-beta.
How severe is CVE-2026-44373?: CVE-2026-44373 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-44373 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44373?: CVE-2026-44373 affects Nitro. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44373?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44373 have an EU (EUVD) identifier?: Yes. CVE-2026-44373 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30163.
When was CVE-2026-44373 published?: CVE-2026-44373 was published on 2026-05-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nitro:nitro:*:*:*:*:*:node.js:*:*

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