CVE-2026-68538
fulgur: Unbounded counters() expansion in generated content causes memory/CPU exhaustion (denial of service)
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 |
| Vendor | fulgur-rs |
| Product | fulgur |
| Published | Nov 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
fulgur-rs / fulgur
>= 0.15.0, < 0.27.0