Banana Slides through 0.4.0, patched in commit e8bc490, contains a path traversal vulnerability in the generate_image() function within the AI service backend that allows unauthenticated attackers to read arbitrary image-format files outside the intended uploads directory by exploiting an incomplete path prefix check using os.path.startswith() without a trailing separator. Attackers can supply crafted markdown image references in user-controlled page descriptions that resolve to sibling directories whose names share the uploads folder prefix, bypassing the directory confinement check and causing the application to read files from unintended locations via PIL Image.open().
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History
Wed, 03 Jun 2026 02:30:00 +0000
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Anionex
Anionex banana-slides |
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Anionex
Anionex banana-slides |
Tue, 02 Jun 2026 16:30:00 +0000
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ssvc
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Mon, 01 Jun 2026 20:30:00 +0000
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| Description | Banana Slides through 0.4.0, patched in commit e8bc490, contains a path traversal vulnerability in the generate_image() function within the AI service backend that allows unauthenticated attackers to read arbitrary image-format files outside the intended uploads directory by exploiting an incomplete path prefix check using os.path.startswith() without a trailing separator. Attackers can supply crafted markdown image references in user-controlled page descriptions that resolve to sibling directories whose names share the uploads folder prefix, bypassing the directory confinement check and causing the application to read files from unintended locations via PIL Image.open(). | |
| Title | Banana Slides 0.4.0 Path Traversal via generate_image() in ai_service.py | |
| Weaknesses | CWE-22 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-06-01T19:09:51.443Z
Updated: 2026-06-02T15:39:40.631Z
Reserved: 2026-05-27T17:40:12.738Z
Link: CVE-2026-49136
Updated: 2026-06-02T15:39:35.879Z
Status : Deferred
Published: 2026-06-01T21:16:46.627
Modified: 2026-06-02T14:45:28.410
Link: CVE-2026-49136
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