HarfBuzz::Shaper versions before 0.032 for Perl contains a bundled library with a null pointer dereference vulnerability

published 2026-01-19 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-3246

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits: 0; none known

HarfBuzz::Shaper versions before 0.032 for Perl contains a bundled library with a null pointer dereference vulnerability.

Versions before 0.032 contain HarfBuzz 8.4.0 or earlier bundled as hb_src.tar.gz in the source tarball, which is affected by CVE-2026-22693.

Patch / fix

fixed in 1

JV HarfBuzz::Shaper 0.032

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-0943 updated 2026-06-28 cvss 3.3

harfbuzz-shaper: HarfBuzz::Shaper null pointer dereference vulnerability

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 9 mo ago (2026-01-20)

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

JV HarfBuzz::Shaper

Classification

Weakness

CWE-1395 Dependency on Vulnerable Third-Party Component
CWE-476 NULL Pointer Dereference

References

bugzilla.redhat.com /show_bug.cgi?id=2429296
issue-tracking, third-party-advisory
cve.org /CVERecord?id=CVE-2026-22693
third-party-advisory, vdb-entry
metacpan.org /release/JV/HarfBuzz-Shaper-0.032/changes
release-notes, product

Sources

CVE List CVE-2026-0943
NVD CVE-2026-0943

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary