CVE-2026-113680

MEDIUM 5.5

HarfBuzz 8.0.0 through 14.6.0 WebAssembly Shaper NULL Pointer Dereference DoS

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-476
Vendor	harfbuzz
Product	harfbuzz
Published	Oct 20, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

harfbuzz / harfbuzz

8.0.0 ≤ 14.6.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/harfbuzz/harfbuzz/pull/6414 github.com: https://github.com/harfbuzz/harfbuzz/commit/a71aa86c2bac114fafb6b47f8da02024ecb44fa6 github.com: https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-buffer.hh#L153-L181 github.com: https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-face.hh#L34-L49 github.com: https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-font.hh#L241-L258 vulncheck.com: https://www.vulncheck.com/advisories/harfbuzz-8.0.0-through-14.6.0-webassembly-shaper-null-pointer-dereference-dos

Credits

Aziz Elbelaychy (Ostorlab)