CVE-2026-68537 json
Fulgur: Unbounded page slicing from attacker-controlled CSS height causes denial of service
published 2026-07-05 4 mo ago modified 2026-10-12 27 d ago also GHSA-4rf6-qx84-q9fv , RUSTSEC-2026-0201 , EUVD-2026-82425
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
`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 version 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.
Patch / fix
- crates.io fulgur 0.26.0
- github.com/fulgur-rs/fulgur#501 pull request
- github.com/fulgur-rs/fulgur#575 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 52 d ago
Exploit prediction
0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | fulgur | <0.26.0 >=0.0.0-0, <0.26.0 |
0.26.0 |
Affected products
- fulgur-rs fulgur
Classification
References
- github.com /fulgur-rs/fulgur/pull/501
-
github.com
/fulgur-rs/fulgur/pull/575
web
-
github.com
/fulgur-rs/fulgur/security/advisories/GHSA-4rf6-qx84-q9fv
web
- rustsec.org /advisories/RUSTSEC-2026-0200.html
-
github.com
/fulgur-rs/fulgur
package
-
rustsec.org
/advisories/RUSTSEC-2026-0201.html
web, advisory
-
crates.io
/crates/fulgur
package
Sources
- CVE List CVE-2026-68537
- GitHub Advisory GHSA-4rf6-qx84-q9fv
- NVD CVE-2026-68537
- OSV RUSTSEC-2026-0201
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