Path Traversal Vulnerability in Banana Slides AI Service by Anionex
CVE-2026-49136

8.7HIGH

Key Information:

Vendor

Anionex

Status
Banana-slides
Vendor
CVE Published:
1 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-49136?

Banana Slides version 0.4.0 suffers from a path traversal vulnerability located in the generate_image() function of the AI service backend. The flaw enables unauthenticated attackers to access arbitrary image files beyond the designated uploads directory. This exploitation occurs due to an incomplete path prefix check, where crafted markdown image references submitted in user-controlled page descriptions can resolve to sibling directories that share the uploads folder prefix. This vulnerability compromises directory confinement checks, allowing the use of PIL Image.open() to read files from unintended locations.

Affected Version(s)

banana-slides 0 <= 0.4.0

banana-slides 0 <= 0.4.0

banana-slides e8bc490ec8b4b657e07dc3ab4e94fbedcaade421

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-49136 - Proof of Concept

References

https://github.com/Anionex/banana-slides/issues/429
technical-descriptionexploit
https://github.com/Anionex/banana-slides/pull/430
issue-tracking
https://github.com/Anionex/banana-slides/commit/e8bc490ec...
patch

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

YU SUN
.