CVE-2026-6879

{"id": "CVE-2026-6879", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-6879", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-28T14:49:33.309576Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "cna@python.org", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 2.0, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "cna@python.org", "affectedData": [{"repo": "https://github.com/python/cpython", "vendor": "Python Software Foundation", "product": "CPython", "versions": [{"status": "affected", "version": "0", "lessThan": "3.10.21", "versionType": "python"}, {"status": "affected", "version": "3.11.0", "lessThan": "3.11.16", "versionType": "python"}, {"status": "affected", "version": "3.12.0", "lessThan": "3.12.14", "versionType": "python"}, {"status": "affected", "version": "3.13.0", "lessThan": "3.13.15", "versionType": "python"}, {"status": "affected", "version": "3.14.0", "lessThan": "3.14.7", "versionType": "python"}, {"status": "affected", "version": "3.15.0a1", "lessThan": "3.15.0rc1", "versionType": "python"}], "defaultStatus": "unaffected"}]}], "published": "2026-07-28T15:17:51.377", "references": [{"url": "https://github.com/python/cpython/commit/02c08e6b747ac43d0d866a4ffa916bedf3423f81", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/037965c00a427cba5c05447efadc67c51a492e85", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/0583f24ae678993e3f7939f51ad5bcae5ad9dc70", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/2ffab083782968a4d732738f4f1dff6bbd69d2b0", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/390337b8ba1658833fdef379e1739c9f9533a8db", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/96510a3758f4a075f43223afdee3b6ee1a7a7f02", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/cb409342a19f25656f62e679f8bac265fe1442c3", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/issues/152674", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/pull/152676", "source": "cna@python.org"}, {"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/7YMZ6DDZVR26TJJBVO3RDNBAVGHNYAKR/", "source": "cna@python.org"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-407"}]}], "descriptions": [{"lang": "en", "value": "`Element.findall()` and fully-consumed `Element.iterfind()` exhibit `O(n^2)` time complexity when using XPath index predicates (e.g. `[1]`, `[last()]`, `[last()-N]`) on XML documents with many same-tag siblings. `Element.find()` is only affected when the first match is near the end\u00a0 of the sibling list, such as with `[last()]` or `[last()-N]`;\u00a0 `.//item[1]` short-circuits after the first match."}], "lastModified": "2026-08-13T01:16:55.457", "sourceIdentifier": "cna@python.org"}