PT-2026-45559 · Anionex · Banana-Slides

Yu Sun · Published 2026-06-01 · Updated 2026-06-01 · CVE-2026-49136

NVD

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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().

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-49136

Affected Products

Banana-Slides

References · 5

• 🔥 https://github.com/Anionex/banana-slides/issues/429 · Exploit
• https://github.com/Anionex/banana-slides/commit/e8bc490ec8b4b657e07dc3ab4e94fbedcaade421 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-49136 · Security Note
• https://github.com/Anionex/banana-slides/pull/430 · Note
• https://vulncheck.com/advisories/banana-slides-path-traversal-via-generate-image-in-ai-service-py · Note