CVE-2026-7210

MEDIUM EPSS 51.7%
Published May 11, 20261mo ago · Modified Jun 17, 20261w ago
6.3 CVSS 4.0
Medium
Find Similar
Published May 11, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

`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.

CVSS Details

Base Score
6.3
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
51.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-331

Affected Products 1

VendorProductVersionRange
pythonpython* <3.15.0

References 9

  • openwall.com http://www.openwall.com/lists/oss-security/2026/05/11/13
    Mailing ListThird Party Advisory
  • openwall.com http://www.openwall.com/lists/oss-security/2026/05/11/8
    Mailing ListThird Party Advisory
  • github.com https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4
    Patch
  • github.com https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566
    Patch
  • github.com https://github.com/python/cpython/commit/eeea765cb9d8f1fc3d8918b272ac3c477983f27a
    Patch
  • github.com https://github.com/python/cpython/commit/fc9b11ff49cbc82e6f917d07a61517a2b5f3145f
    Patch
  • github.com https://github.com/python/cpython/issues/149018
    Issue Tracking
  • github.com https://github.com/python/cpython/pull/149023
    Issue TrackingPatch
  • mail.python.org https://mail.python.org/archives/list/security-announce@python.org/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/
    Mailing ListThird Party Advisory

Remediation

  • github.com https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4
    Patch
  • github.com https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566
    Patch
  • github.com https://github.com/python/cpython/commit/eeea765cb9d8f1fc3d8918b272ac3c477983f27a
    Patch
  • github.com https://github.com/python/cpython/commit/fc9b11ff49cbc82e6f917d07a61517a2b5f3145f
    Patch
  • github.com https://github.com/python/cpython/pull/149023
    Issue TrackingPatch