Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Versions of fulgur before 0.26.0 are vulnerable to denial of service. A childless box with a very large height, such as an unresolved image, a hidden image, an undecodable image, or an empty svg element, can expand into up to about 10,000 blank PDF pages, exhausting CPU and memory. An attacker who can submit HTML to a fulgur-based conversion service can trigger this with a very small input. Upgrade to fulgur 0.26.0 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0061, the 49th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:24 UTC First seen by agentprime
- 31 Oct 2026, 14:24 UTC Confirmed by OSV