CVE-2026-68539

HIGH 7.5

fulgur: Unbounded string-set value accumulation 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 0.4.4 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.

CWE	CWE-400 CWE-770
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

>= 0.4.4, < 0.29.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/fulgur-rs/fulgur/security/advisories/GHSA-vw2v-g4x7-xcqg github.com: https://github.com/fulgur-rs/fulgur/pull/582 github.com: https://github.com/fulgur-rs/fulgur/pull/584 github.com: https://github.com/fulgur-rs/fulgur/commit/1c4cdad003daef7c9dc6ef1362c50bcfaac13ea9 github.com: https://github.com/fulgur-rs/fulgur/commit/9248fbfd91a2ba8fc3dbd9e44ba681f52ed1ecd0 github.com: https://github.com/fulgur-rs/fulgur/releases/tag/v0.29.0