CVE-2026-68540: DoS (CVSS 7.5)

Description

fulgur converts untrusted HTML/CSS into PDF, commonly on a server that processes input supplied by many tenants. From version 0.6.0 to before version 0.33.0, quadratic style-list reprocessing during containing-block resolution for absolutely-positioned pseudo-elements cause denial of service. This issue has been patched in version 0.33.0.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0062

Probability of exploitation

0.50%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

CWE-405 CWE-405

References

Other References

https://github.com/fulgur-rs/fulgur/commit/8fabbca271313c56ef48f1d20d0040e1cf130de5 https://github.com/fulgur-rs/fulgur/pull/602 https://github.com/fulgur-rs/fulgur/releases/tag/v0.33.0 https://github.com/fulgur-rs/fulgur/security/advisories/GHSA-v8x5-rchq-jr47

Frequently Asked Questions

What is CVE-2026-68540? +

fulgur converts untrusted HTML/CSS into PDF, commonly on a server that processes input supplied by many tenants. From version 0.6.0 to before version 0.33.0, quadratic style-list reprocessing during containing-block resolution for absolutely-positioned pseudo-elements cause denial of service. This issue has been patched in version 0.33.0. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-68540? +

CVE-2026-68540 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0062, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-68540? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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