AzureADTrent/CVE-2026-52824

GitHubRepository PoCWriteup

PoC files

1 file

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GitHub
Analysisdeepseek-v4-pro:cloud ·

Technical assessment

A technical writeup for CVE-2026-52824 detailing how a hardcoded APP_SECRET in Kimai Docker images allows forging login links. It includes a PHP code snippet demonstrating the forgery logic but the artifact itself is a README.md document providing analysis, detection, and remediation guidance.

Backdoor review

No backdoor observed in reviewed code

The artifact is a single README.md file documenting CVE-2026-52824. It contains a proof-of-concept PHP script that demonstrates forging a login link for a known-vulnerable Kimai instance. The script uses a hardcoded default secret to compute a valid HMAC and constructs a URL. No backdoor, deceptive payload, or concealed executable behavior targeting the reviewer is present. The PoC is transparently described and serves only to illustrate the vulnerability.

ClassificationWriteup
Model confidence98%
AuthenticationNot required
LanguagesMarkdownPHP
Target softwareKimai
Attack typesAuthentication BypassInsecure Default
Evidence & reasoningClassification basis · observed behavior · safety review
Technical evidence

Classification basis and observed behavior

Classification basis

The artifact is a README.md file containing a technical analysis of CVE-2026-52824, including root cause, proof-of-concept code snippet, detection commands, and remediation steps. It does not function as a standalone exploit or scanner; it is a documentation writeup.

README.md:1-118

Requirements

  • Target Kimai instance uses the default APP_SECRET 'change_this_to_something_unique'README.md:21-25
  • Attacker knows or guesses a valid username and user IDREADME.md:79-81

Observed behavior

  • Describes forging a login link by computing an HMAC with the known secret and user IDREADME.md:42-67
  • Explains that a successful forged request returns a 302 redirect and sets a KIMAI_REMEMBER cookieREADME.md:69
Safety-review evidence

Behaviors behind the backdoor verdict

Observables

Proof Of Concept Code
PHP script computing HMAC-SHA256 with hardcoded secret 'change_this_to_something_unique'Demonstrates the CVE-2026-52824 vulnerability by forging a login link. The code is presented as a static example and does not perform any hidden or harmful action against the reviewer.README.md:42-67
Review boundaries

What the analysis did not establish

  • Only one file (README.md) is provided; no other repository files were inspected.
  • The artifact is a writeup, not executable code; classification is based on its stated purpose and content.
  • Only the README.md file was reviewed; no other files were present in the evidence packet.
  • The analysis scope confirms no binary files were inspected, but none were identified in the artifact.
Model interpretation

This review is limited to the supplied PoC code and context. It does not assert that the code works or is safe to execute.

Linked vulnerabilities

1