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OpenAdvisories
High RHSA-2026:88248 2 CVEs

Red Hat Security Advisory: expat security update

Published Nov 13, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 4

ReleasePackageFixed in
Red Hat · RHEL 10 enterprise_linux:10.2 expat 0:2.7.3-1.el10_2.7
Red Hat · RHEL 10 enterprise_linux:10.2 expat-debuginfo 0:2.7.3-1.el10_2.7
Red Hat · RHEL 10 enterprise_linux:10.2 expat-debugsource 0:2.7.3-1.el10_2.7
Red Hat · RHEL 10 enterprise_linux:10.2 expat-devel 0:2.7.3-1.el10_2.7

Vulnerabilities 2

  • High 8.2
    CVE-2026-77214

    libexpat Heap Buffer Over-read in xmlparse.c via XML_ParseBuffer

    libexpat before commit 13c5f63 contains a heap buffer over-read vulnerability in xmlparse.c. XML_ParseBuffer advances the parse buffer end with parser->m_bufferEnd += len using a caller-supplied length that is not validated against the allocated buffer size, …

    libexpat project libexpat insighttoolkit4 cmake Debian Ubuntu Azure Linux Alpine
  • Medium 5.9
    CVE-2026-102633

    libexpat 2.7.2 through 2.8.5 Integer Overflow in expat_realloc

    libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes. Attackers supplying malicious XML to applications parsing with vulnerable libexpat can cause heap …

    libexpat project libexpat insighttoolkit4 expat Debian Ubuntu Azure Linux Alpine

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2543288
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2547476
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_88248.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-77214
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-77214
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-77214
  • article
    https://github.com/libexpat/libexpat/commit/13c5f63a7f1c52c2feee3b16a1134d4fb68e9ea0
  • article
    https://github.com/libexpat/libexpat/pull/1393
  • article
    https://www.vulncheck.com/advisories/libexpat-heap-buffer-over-read-in-xmlparse-c-via-xml-parsebuffer
  • report
    https://access.redhat.com/security/cve/CVE-2026-102633
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-102633
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-102633
  • article
    https://github.com/libexpat/libexpat
  • article
    https://github.com/libexpat/libexpat/blob/R_2_8_5/expat/lib/xmlparse.c#L1003
  • article
    https://github.com/libexpat/libexpat/commit/209801d7fbaf07ab74bae8cb32dd2ab9e5846118
  • article
    https://github.com/libexpat/libexpat/pull/1392
  • article
    https://www.vulncheck.com/advisories/libexpat-2.7.2-through-2.8.5-integer-overflow-in-expat-realloc