CVE-2026-68539
fulgur: Unbounded string-set value accumulation causes memory/CPU exhaustion (denial of service)
fulgur converts untrusted HTML/CSS into PDF, commonly on a server that processes input supplied by many tenants. From version 0.4.4 to before version 0.29.0, the CSS string-set named-string values resolved from a document were accumulated per element with no memory budget, letting a small crafted document amplify into large retained memory (and the CPU to copy it) — results in a denial of service. This issue has been patched in version 0.29.0.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| fulgur fulgur-rs |
>= 0.4.4, < 0.29.0 (affected) | CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/fulgur-rs/fulgur/security/advisories/GHSA-vw2v-g4x7-xcqgCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/fulgur-rs/fulgur/pull/582CNA: GitHub_M · x_refsource_MISC
- https://github.com/fulgur-rs/fulgur/pull/584CNA: GitHub_M · x_refsource_MISC
- https://github.com/fulgur-rs/fulgur/commit/1c4cdad003daef7c9dc6ef1362c50bcfaac13ea9CNA: GitHub_M · x_refsource_MISC
- https://github.com/fulgur-rs/fulgur/commit/9248fbfd91a2ba8fc3dbd9e44ba681f52ed1ecd0CNA: GitHub_M · x_refsource_MISC
- https://github.com/fulgur-rs/fulgur/releases/tag/v0.29.0CNA: GitHub_M · x_refsource_MISC
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