CVE Explorer
CVE-2026-6879
`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 of the sibling list, such as with `[last()]` or `[last()-N]`; `.//item[1]` short-circuits after the first match.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"CPython","repo":"https://github.com/python/cpython","vendor":"Python Software Foundation","versions":[{"lessThan":"3.15.0","status":"affected","version":"0","versionType":"python"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:49b62469148a027360b6538bc3afdf9d7c492513c596ee37c92750d2f598c25c · sha256:fc5bb2f6fb281671… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","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","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:49b62469148a027360b6538bc3afdf9d7c492513c596ee37c92750d2f598c25c · sha256:fc5bb2f6fb281671… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-407","description":"CWE-407 Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:49b62469148a027360b6538bc3afdf9d7c492513c596ee37c92750d2f598c25c · sha256:fc5bb2f6fb281671… · /containers/adp/0/problemTypes/0/descriptions/0
Source references
7 source assertions{"tags":["patch"],"url":"https://github.com/python/cpython/commit/02c08e6b747ac43d0d866a4ffa916bedf3423f81"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:49b62469148a027360b6538bc3afdf9d7c492513c596ee37c92750d2f598c25c · sha256:fc5bb2f6fb281671… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/2ffab083782968a4d732738f4f1dff6bbd69d2b0"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:49b62469148a027360b6538bc3afdf9d7c492513c596ee37c92750d2f598c25c · sha256:fc5bb2f6fb281671… · /containers/cna/references/3
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/390337b8ba1658833fdef379e1739c9f9533a8db"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:49b62469148a027360b6538bc3afdf9d7c492513c596ee37c92750d2f598c25c · sha256:fc5bb2f6fb281671… · /containers/cna/references/5
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/cb409342a19f25656f62e679f8bac265fe1442c3"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:49b62469148a027360b6538bc3afdf9d7c492513c596ee37c92750d2f598c25c · sha256:fc5bb2f6fb281671… · /containers/cna/references/6
{"tags":["issue-tracking"],"url":"https://github.com/python/cpython/issues/152674"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:49b62469148a027360b6538bc3afdf9d7c492513c596ee37c92750d2f598c25c · sha256:fc5bb2f6fb281671… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/python/cpython/pull/152676"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:49b62469148a027360b6538bc3afdf9d7c492513c596ee37c92750d2f598c25c · sha256:fc5bb2f6fb281671… · /containers/cna/references/0
{"tags":["vendor-advisory"],"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/7YMZ6DDZVR26TJJBVO3RDNBAVGHNYAKR/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:49b62469148a027360b6538bc3afdf9d7c492513c596ee37c92750d2f598c25c · sha256:fc5bb2f6fb281671… · /containers/cna/references/2
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.