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CVE-2026-7210

`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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:981630193bc325297f1e16fcad161dbfdedcd04de214125cdba63cbe908a6226
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","modules":["xml","expat"],"product":"CPython","repo":"https://github.com/python/cpython","vendor":"Python Software Foundation","versions":[{"lessThan":"3.13.14","status":"affected","version":"0","versionType":"python"},{"lessThan":"3.14.6","status":"affected","version":"3.14.0","versionType":"python"},{"lessThan":"3.15.0b2","status":"affected","version":"3.15.0a1","versionType":"python"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-331","description":"CWE-331 Insufficient entropy","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/cna/problemTypes/0/descriptions/0

Source references

9 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/05/11/13"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/adp/1/references/1
{"url":"http://www.openwall.com/lists/oss-security/2026/05/11/8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/adp/1/references/0
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/cna/references/3
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/eeea765cb9d8f1fc3d8918b272ac3c477983f27a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/cna/references/5
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/fc9b11ff49cbc82e6f917d07a61517a2b5f3145f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/cna/references/6
{"tags":["issue-tracking"],"url":"https://github.com/python/cpython/issues/149018"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/cna/references/2
{"tags":["patch"],"url":"https://github.com/python/cpython/pull/149023"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/cna/references/1
{"tags":["vendor-advisory"],"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c546b9976c8a10723e8b63685f5869eaa6e89a3b73aedec1524edb978a3e6cd · sha256:5cf42845602da7cb… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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