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Vulnerabilities

Vulnerability · CVE-2026-22693

HarfBuzz is a text shaping engine.

Published Jan 10, 2026 · catalog updated Jan 12, 2026 · HarfBuzz is a text

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-22693. EPSS is 0.45%. Act only if a listed version of HarfBuzz is a text is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (HarfBuzz is a text).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.45%
Remediation
Version ranges on file
Affected products
vendor harfbuzz harfbuzz < 12.3.0

HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability exists in the SubtableUnicodesCache::create function located in src/hb-ot-cmap-table.hh. The function fails to check if hb_malloc returns NULL before using placement new to construct an object at the returned pointer address. When hb_malloc fails to allocate memory (which can occur in low-memory conditions or when using custom allocators that simulate allocation failures), it returns NULL. The code then attempts to call the constructor on this null pointer using placement new syntax, resulting

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor harfbuzz harfbuzz < 12.3.0< 12.3.0

How to fix CVE-2026-22693

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-22693. EPSS is 0.45%. Act only if a listed version of HarfBuzz is a text is installed.

Which versions are affected?

Compare what you have installed with harfbuzz harfbuzz < 12.3.0 < 12.3.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.45%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 10, 2026 · EUVD

    Detected

    HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability exists in the SubtableUnicodesCache::create function located in src/hb-ot-cmap-table.hh. The function fails to check if hb_malloc returns NULL before using placement new to construct an object at the returned pointer address. When hb_malloc fails to allocate memory (which can occur in low-memory co

  2. Jan 12, 2026 · EUVD

    Updated

    HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability exists in the SubtableUnicodesCache::create function located in src/hb-ot-cmap-table.hh. The function fails to check if hb_malloc returns NULL before using placement new to construct an object at the returned pointer address. When hb_malloc fails to allocate memory (which can occur in low-memory co

Sources

  • CVE.orgVulnerability recordCVE-2026-22693

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-22693

    30-day exploitation probability 0.45%

    first.org
  • EUVDVulnerability recordEUVD-2026-1871

    HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability exists in the SubtableUnicodesCache::create function located in src/hb-ot-cmap-table.hh. The function fails to check if hb_malloc returns NULL before using placement new to constr

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 6, 2026
  • CVE.orgOct 31, 2026
  • EUVDOct 30, 2026