5.3

CVE-2026-44373: nitro Path Traversal

CVSS: 5.3v3.1MediumAnalyzed
AliasesGHSA-5w89-w975-hf9q
Published 13-05-2026Last modified 14-05-2026
Open JSON

Vulnerability summary

CVE-2026-44373 is a medium (CVSS 5.3) Path Traversal vulnerability in nitro. EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 46.3% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.57%
0%100%
Low · +0.18 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-05-2026
    PublishedVulnerability first disclosed.
  2. 14-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.57%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

+0.18 pp

From 0.39% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.57%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Nitrojs2 products
Npm2 products
  • nitro< 3.0.260429-beta
  • nitropack< 2.13.4
Nitro1 product
  • nitro< 2.13.4 | > 2.13.4, < 3.0.260429

3 vendors · 5 products

References

7 links