CVE-2026-72522

Summary

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.

Affected Software

Weaknesses

• CWE-125: CWE-125 Out-of-bounds Read

ADP Enrichment

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2026/08/11/5

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/libexpat/libexpat/pull/1296
• https://bugzilla.mozilla.org/show_bug.cgi?id=2053153

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