CVE-2026-27807 affects MarkUs, a web application for student assignment submission and grading, specifically versions prior to 2.9.4. The vulnerability stems from the application's parsing of instructor-uploaded YAML files with aliases enabled, leading to a potential denial of service. With a CVSS score of 4.9 (Medium), this vulnerability requires high privileges (PR:H) and has a high impact on availability (A:H), but no impact on confidentiality or integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.9.4CPE matchmatch criteria | cpe:2.3:a:markusproject:markus:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.