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CVE-2026-113680

HarfBuzz 8.0.0 through 14.6.0 WebAssembly Shaper NULL Pointer Dereference DoS

6.8 Medium

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 profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.17%Unchanged since Oct 21, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.8

HarfBuzz 8.0.0 through 14.6.0 WebAssembly Shaper NULL Pointer Dereference DoS

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.

Record
CVE-2026-113680
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
EUVDEUVD-2026-105096 6.8

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.

Record
EUVD-2026-105096
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-2fqx-2h7j-c7gq 6.8

HarfBuzz from 8.0.0 through 14.6.0 contains a NULL pointer dereference vulnerability in the...

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.

Record
GHSA-2fqx-2h7j-c7gq
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
NVD 6.8

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.

Record
CVE-2026-113680
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
OSV 6.8

HarfBuzz 8.0.0 through 14.6.0 WebAssembly Shaper NULL Pointer Dereference DoS

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.

Record
CVE-2026-113680
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-476
Updated
2026-11-02
OSVDEBIAN-CVE-2026-113680 6.8

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.

Record
DEBIAN-CVE-2026-113680
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVUBUNTU-CVE-2026-113680 6.8

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.

Record
UBUNTU-CVE-2026-113680
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVAZL-109809 No score

CVE-2026-113680 affecting package harfbuzz 8.3.0-4

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.

Record
AZL-109809
Updated
2026-11-02
OSVAZL-112811 No score

CVE-2026-113680 affecting package qtbase 6.6.3-7

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.

Record
AZL-112811
Updated
2026-11-07

Affected products

Affected packages

Affected packages
PackageAffectedFixed
harfbuzz
Azure Linux:3
 through 8.3.0-4 None known
qtbase
Azure Linux:3
 through 6.6.3-7 None known
harfbuzz
Debian:12
 All versions, plus listed versions
10.0.1-110.1.0-110.1.0-210.2.0-110.2.0-2
Show 19 moreShow less
11.4.5-111.5.0-112.1.0-112.2.0-112.3.0-112.3.0-212.3.0-312.3.0-412.3.1-112.3.2-112.3.2-26.0.0+dfsg-38.0.0-18.0.0-28.0.0-38.0.1-18.3.0-18.3.0-29.0.0-1
 None known
harfbuzz
Debian:13
 All versions, plus listed versions
10.2.0-110.2.0-1+deb13u110.2.0-211.4.5-111.5.0-1
Show 9 moreShow less
12.1.0-112.2.0-112.3.0-112.3.0-212.3.0-312.3.0-412.3.1-112.3.2-112.3.2-2
 None known
harfbuzz
Debian:14
 All versions, plus listed versions
10.2.0-110.2.0-211.4.5-111.5.0-112.1.0-1
Show 8 moreShow less
12.2.0-112.3.0-112.3.0-212.3.0-312.3.0-412.3.1-112.3.2-112.3.2-2
 None known
harfbuzz
Ubuntu:14.04:LTS
 All versions, plus listed versions
0.9.19-10.9.19-1ubuntu10.9.24-2ubuntu10.9.24-2ubuntu20.9.24-2ubuntu3
Show 6 moreShow less
0.9.25-1ubuntu10.9.26-30.9.26-40.9.27-10.9.27-1ubuntu10.9.27-1ubuntu1.1
 None known
harfbuzz
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1.0.1-1build21.0.1-1ubuntu0.11.0.1-1ubuntu0.1+esm1
 None known
harfbuzz
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.4.2-11.4.2-1build11.6.3-1build11.7.1-11.7.2-11.7.2-1ubuntu1
 None known
harfbuzz
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.6.1-32.6.2-12.6.4-12.6.4-1ubuntu12.6.4-1ubuntu2
Show 4 moreShow less
2.6.4-1ubuntu32.6.4-1ubuntu42.6.4-1ubuntu4.22.6.4-1ubuntu4.3
 None known
harfbuzz
Ubuntu:22.04:LTS
 All versions, plus listed versions
2.7.4-1ubuntu12.7.4-1ubuntu22.7.4-1ubuntu32.7.4-1ubuntu3.12.7.4-1ubuntu3.2
 None known
harfbuzz
Ubuntu:24.04:LTS
 All versions, plus listed versions
8.0.1-18.0.1-1build18.3.0-28.3.0-2build18.3.0-2build2
 None known
harfbuzz
Ubuntu:26.10
 All versions, plus listed versions
12.3.2-2
 None known
harfbuzz
Ubuntu:26.04:LTS
 All versions, plus listed versions
10.2.0-112.1.0-112.1.0-1build112.2.0-112.3.0-3
Show 4 moreShow less
12.3.0-412.3.1-112.3.2-112.3.2-2
 None known

History

History
RecordedChangedSources
affected, aliases, factsOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-113680 is a medium vulnerability (CVSS 6.8) in Harfbuzz, published October 20, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 6th percentile. No source names a fixed version.

References

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