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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
harfbuzz harfbuzz unaffected
Version Status Constraints
8.0.0 affected ≤ 14.6.0

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Project Subscriptions

Vendors Products
Harfbuzz Project Subscribe
Harfbuzz Subscribe
Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Tue, 20 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
Description 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.
Title HarfBuzz 8.0.0 through 14.6.0 WebAssembly Shaper NULL Pointer Dereference DoS
First Time appeared Harfbuzz Project
Harfbuzz Project harfbuzz
Weaknesses CWE-476
CPEs cpe:2.3:a:harfbuzz_project:harfbuzz:*:*:*:*:*:*:*:*
Vendors & Products Harfbuzz Project
Harfbuzz Project harfbuzz
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-20T15:40:41.101Z

Reserved: 2026-10-20T14:51:02.127Z

Link: CVE-2026-113680

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-20T16:17:12.923

Modified: 2026-10-20T16:17:12.923

Link: CVE-2026-113680

cve-icon Redhat

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cve-icon OpenCVE Enrichment

No data.

Weaknesses