CVE-2026-68538
Published:November 11, 2026
Updated:November 12, 2026
fulgur converts untrusted HTML/CSS into PDF, commonly on a server that processes input supplied by many tenants. From version 0.15.0 to before version 0.27.0, resolving the CSS counters(name, sep) function in generated content was bounded neither in the size of a single expansion nor in the aggregate work across an element tree. An attacker able to submit HTML/CSS to a fulgur-based conversion service can trigger CPU and memory exhaustion with a trivially small payload, denying service to the host and any co-tenants. This issue has been patched in version 0.27.0.
Affected Packages
https://github.com/fulgur-rs/fulgur.git (GITHUB):
Affected version(s) >=v0.15.0 <v0.27.0Fix Suggestion:
Update to version v0.27.0pyfulgur (PYTHON):
Affected version(s) >=0.15.0 <0.27.0Fix Suggestion:
Update to version 0.27.0fulgur (RUBY):
Affected version(s) >=0.15.0 <0.27.0Fix Suggestion:
Update to version 0.27.0fulgur (RUST):
Affected version(s) >=0.15.0 <0.27.0Fix Suggestion:
Update to version 0.27.0Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Uncontrolled Resource Consumption
EPSS
Base Score:
0.60