NULL pointer dereference in Harfbuzz
CVE-2026-113680
HarfBuzz from 8.0.0 through 14.6.0 contains a NULL pointer dereference vulnerability in the experimental WebAssembly shaper host imports buffer_set_contents, face_create, and font_set_coords. Attackers can supply a crafted font whose embedded wasm module passes out-of-range addresses with non-zero lengths, crashing any application that shapes text with the font.
Published .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/harfbuzz/harfbuzz/pull/6414 (issue-tracking, patch)
- github.com/harfbuzz/harfbuzz/commit/a71aa86c2bac114fafb6b47f8da02024ecb44fa6 (patch)
- github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-buffer.hh (technical-description)
- github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-face.hh (technical-description)
- github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-font.hh (technical-description)
- www.vulncheck.com/advisories/harfbuzz-8.0.0-through-14.6.0-webassembly-shaper-n… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-113680?
- CVE-2026-113680 is a medium-severity vulnerability in Harfbuzz, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-10-20.
- How severe is CVE-2026-113680?
- Medium severity. CVSS v3 base score is 5.5 out of 10.