CVE-2026-76875
- Source
- https://cve.org/CVERecord?id=CVE-2026-76875
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76875.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-76875
- Downstream
- Published
- 2026-09-29T12:45:19Z
- Modified
- 2026-10-03T03:30:24Z
- Severity
-
- 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- PyPy pyexpat ExternalEntityParserCreate Use-After-Free
- Details
-
PyPy before versions 3.11.16 and 3.12.14 contains a use-after-free vulnerability in the pyexpat module's ExternalEntityParserCreate function that allows attackers to corrupt memory by supplying a crafted XML document to applications that create external-entity sub-parsers without retaining a reference to the parent parser. The child parser retains a raw C back-pointer to the parent parser struct while PyPy's tracing garbage collector can free the parent's C struct, causing bundled libexpat to dereference the freed pointer on every parsed token, producing memory corruption.
- Database specific
{ "cna_assigner": "VulnCheck", "cwe_ids": [ "CWE-416" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76875.json", "unresolved_ranges": [ { "extracted_events": [ { "fixed": "3.11.16" }, { "introduced": "3.12.0" }, { "fixed": "3.12.14" } ], "source": "AFFECTED_FIELD" } ] }- References
-
- https://doc.pypy.org/release-v8.0.0.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76875.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-76875
- https://www.vulncheck.com/advisories/pypy-pyexpat-externalentityparsercreate-use-after-free
- https://github.com/pypy/pypy/releases/tag/release-pypy3.11-v8.0.0
- https://github.com/pypy/pypy/releases/tag/release-pypy3.12-v8.0.0
- https://github.com/pypy/pypy