What is CVE-2024-46478?

CVE-2024-46478 is a critical-severity vulnerability in Htmldoc Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2024-10-24.

How severe is CVE-2024-46478?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Htmldoc Project

CVE-2024-46478

HTMLDOC v1.9.18 contains a buffer overflow in parse_pre function,ps-pdf.cxx:5681.

Vulnerability class: Buffer Overflow

Published 2024-10-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (50.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Htmldoc Project — versions 1.9.18

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/michaelrsweet/htmldoc/issues/529 (Exploit, Third Party Advisory, Issue Tracking)
github.com/michaelrsweet/htmldoc/commit/683bec548e642cf4a17e003fb34f6bbaf2d27b98 (Patch)

Frequently asked questions

What is CVE-2024-46478?: CVE-2024-46478 is a critical-severity vulnerability in Htmldoc Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2024-10-24.
How severe is CVE-2024-46478?: Critical severity. CVSS v3 base score is 9.8 out of 10.