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CVE-2026-69249 is an uncontrolled resource-consumption vulnerability in python-cryptography versions 42.0.0 through 48.0.0. When validating an invalid X.509 certificate chain containing duplicate self-signed certificates, the recursive build_chain_inner path-building logic can revisit the same candidate certificates without deduplication, producing exponential validation work. Maximum chain-depth limits ensure termination but do not prevent substantial processing delays. Version 49.0.0 corrects the issue.
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No public exploit code observed for this vulnerability.
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23 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remotely exploitable, low-complexity vulnerability with no required privileges or user interaction that affects availability only (CVSS 3.0: 7.5). The referenced Oracle Linux update addresses the issue in python3-cryptography.
A vulnerability tracked as CVE-2026-69249 affecting the Rocky Linux 10 python-cryptography package set, with CVSS vectors indicating unauthenticated, low-complexity network exploitation and high availability impact.
A denial-of-service vulnerability in python-cryptography in which duplicate self-signed intermediate certificates can cause exponential certificate path-building, affecting availability.
A denial-of-service vulnerability in python-cryptography where duplicate self-signed intermediate certificates can cause exponential certificate path-building, impacting availability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.