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CVE-2026-6879

Published Jul 28, 2026 CWE-407

Overview

CVE-2026-6879 is a known-severity vulnerability. It was published on July 28, 2026.

Technical Description

`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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHub github.com/python/cpython/commit/02c08e6b747ac43d0d866a4ffa916bedf3423f81 GitHub github.com/python/cpython/commit/037965c00a427cba5c05447efadc67c51a492e85 GitHub github.com/python/cpython/commit/0583f24ae678993e3f7939f51ad5bcae5ad9dc70 GitHub github.com/python/cpython/commit/2ffab083782968a4d732738f4f1dff6bbd69d2b0 GitHub github.com/python/cpython/commit/390337b8ba1658833fdef379e1739c9f9533a8db GitHub github.com/python/cpython/commit/96510a3758f4a075f43223afdee3b6ee1a7a7f02 GitHub github.com/python/cpython/commit/cb409342a19f25656f62e679f8bac265fe1442c3 GitHub github.com/python/cpython/issues/152674 GitHub github.com/python/cpython/pull/152676 Ref mail.python.org/archives/list/[email protected]/thread/7YMZ6DDZVR26TJJBVO3RDNBAVGHNYAKR/

Frequently Asked Questions

What is CVE-2026-6879?

CVE-2026-6879 is a known-severity vulnerability. It was published on July 28, 2026.

How severe is CVE-2026-6879?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2026-6879?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-6879?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-6879 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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