CVE-2026-68523 PUBLISHED

Fulgur: Unbounded page slicing from attacker-controlled CSS height causes denial of service

Assigner: GitHub_M
Reserved: 30.07.2026 Published: 17.09.2026 Updated: 17.09.2026

fulgur converts untrusted HTML/CSS into PDF, commonly on a server that processes input supplied by many tenants. In versions prior to 0.19.0, a body-direct child whose CSS-resolved height greatly exceeds the page height was sliced into one fragment per page with no upper bound. This is fixed in 0.19.0. A MAX_PAGES cap bounds the slice loop — halting it even for a +inf height — and non-finite layout heights are sanitized so they can no longer drive the loop. As a workaround, validate or constrain untrusted CSS (in particular height / vh on body-level elements) before passing HTML to fulgur.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Product Status

Vendor fulgur-rs
Product fulgur
Versions
  • Version < 0.19.0 is affected

References

Problem Types

  • CWE-400: Uncontrolled Resource Consumption CWE
  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') CWE