CVE-2026-0943: HarfBuzz::Shaper versions before 0.032 for Perl contains a bundled library with a null pointer dereference vul

Q: How do I fix CVE-2026-0943?

harfbuzz\: upgrade to 0.032. Exact commands for each OS are on this page.

Q: Is CVE-2026-0943 being exploited?

CVE-2026-0943 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-0943 affect?

CVE-2026-0943 affects harfbuzz\. Severity is high (CVSS 7.5). 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 aff

Q: How urgent is CVE-2026-0943?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2026-0943 is a high-severity flaw (CVSS 7.5) affecting harfbuzz\. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-476
Published	2026-01-19
Last modified	2026-06-17

Publisher (CNA): CPANSec · Vendor: jv

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-19 04:15 UTCPublished CVE record published
2026-06-17 10:11 UTCUpdated Record last modified

jv harfbuzz\ UPGRADE

Affected: < 0.032

Fixed in: 0.032

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy harfbuzz || rpm -q harfbuzz || harfbuzz --version

2. UPGRADE to 0.032 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade harfbuzz

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade harfbuzz

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-0943?

harfbuzz\: upgrade to 0.032. Exact commands for each OS are on this page.

Is CVE-2026-0943 being exploited?

CVE-2026-0943 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-0943 affect?

CVE-2026-0943 affects harfbuzz\. Severity is high (CVSS 7.5). 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 aff

How urgent is CVE-2026-0943?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Software pages

Perl vulnerabilities

References

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