`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this…
High CVSS 7.5
Summary
`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch.
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Affected products
- :
Sources
- NVD DATABASE
Original Links
- https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4 Patch
- https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566 Patch
- https://github.com/python/cpython/commit/eeea765cb9d8f1fc3d8918b272ac3c477983f27a Patch
- https://github.com/python/cpython/commit/fc9b11ff49cbc82e6f917d07a61517a2b5f3145f Patch
- https://github.com/python/cpython/issues/149018 Issue Tracking
- https://github.com/python/cpython/pull/149023 Issue Tracking
- https://mail.python.org/archives/list/security-announce@python.org/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/ Mailing List
- http://www.openwall.com/lists/oss-security/2026/05/11/13 Mailing List
- http://www.openwall.com/lists/oss-security/2026/05/11/8 Mailing List
Timeline
- nvd_ingest NVD