CVE-2026-27882

MEDIUM

Coolify: Timing Attack in GitLab Webhook Token Validation

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-27882. PoCs published by HermesNA-1.

AI-analyzed exploit summary This repository contains an auto-generated stub module for CVE-2026-27882, a non-constant-time string comparison vulnerability in Coolify's GitLab webhook endpoint. The code includes placeholder methods (`check` and `run`) but lacks actual exploit implementation or technical details about the vulnerability mechanics.

Description

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.461, the GitLab webhook endpoint uses a non-constant-time string comparison operator (!==) to validate the webhook secret token. This implementation is vulnerable to timing attacks, which could allow an attacker to gradually discover the secret token by measuring response time differences. This vulnerability is fixed in 4.0.0-beta.461.

Exploits (1)

github STUB 1 stars
by HermesNA-1 · pythonpoc
https://github.com/HermesNA-1/SnakeSploit/tree/main/data/modules_generated/cve-2026-27882_coolify_open-source.py

This repository contains an auto-generated stub module for CVE-2026-27882, a non-constant-time string comparison vulnerability in Coolify's GitLab webhook endpoint. The code includes placeholder methods (`check` and `run`) but lacks actual exploit implementation or technical details about the vulnerability mechanics.

Classification
Stub 99%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Theoretical
Target: Coolify prior to 4.0.0-beta.461
No auth needed
Prerequisites: Network access to Coolify's GitLab webhook endpoint · Knowledge of the target's secret token (if any)
mistral-large-3 · analyzed Jul 09, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 4.8
EPSS 0.0015
EPSS Percentile 4.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-208
Status published
Products (1)
coollabsio/coolify < 4.0.0-beta.461
Published Jun 30, 2026
Tracked Since Jun 30, 2026