What’s Vulnerable › Vulnerabilities

CVE-2026-107805: Nginx UI: Unauthenticated signed-request body staging can exhaust temporary storage

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-09 · updated 2026-10-20
• Weakness: CWE-400

Description

Nginx UI is a web user interface for the Nginx web server. From 2.5.0 until 2.6.0, the node-signature authentication path performs temporary file staging of an attacker-controlled request body and synchronizes it before validating the body digest and cryptographic signature. An unauthenticated remote client that can reach the API and provide syntactically valid signature metadata can consume temporary filesystem capacity, disk input and output, and request-processing resources before rejection. The issue affects availability and does not bypass authentication or provide confidentiality or integrity impact. This issue is fixed in version 2.6.0.

Affected products

• 0xJacky nginx-ui: from 2.5.0 before 2.6.0 — fixed in 2.6.0

How to fix

Upgrade to a fixed version: 0xJacky nginx-ui 2.6.0. Check the vendor advisory for mitigations.

References

• https://github.com/0xJacky/nginx-ui/commit/8c9b9a1aff218ee6c980d047b750e49da3c46796
• https://github.com/0xJacky/nginx-ui/releases/tag/v2.6.0
• https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-j3hg-9rp3-5hw9

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