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CVE-2026-117610

8.2 high Published
NVD · CVE.org

libexpat through 2.9.0 contains a NULL pointer dereference vulnerability in externalEntityInitProcessor2() in lib/xmlparse.c that mishandles the XML_TOK_NONE token from empty input. Attackers who control stream chunking can force an empty non-final first parse on an external entity subparser, causing a later parse to crash the application.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 6

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-28 02:03
  2. StatusPublished → Awaiting AnalysisNVD modified 2026-10-28 15:21
  3. StatusReceived → PublishedNVD modified 2026-10-28 02:03
  4. StatusPublished → ReceivedNVD modified 2026-10-28 03:17
  5. CVSS8.2 (v4.0, CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N) → 8.2 (v4.0, CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)NVD modified 2026-10-28 03:17
  6. First seenCVSS 8.2 · libexpatNVD modified 2026-10-28 02:03

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 5