CVE•Published 2026-09-01•Modified 2026-09-09•0 articles on news•5 live references•NVD data
CVE-2026-84309
Vulnerability data via NVD (ingested)
CVSS v3.1
—
EPSS percentile
3
Exploit Prediction Scoring System · top 97% of all CVEs
Weaknesses (CWE)
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.0, an attacker can craft a PDF whose cyclic tree structure causes pypdf/generic/_data_structures.py TreeObject.insert_child to follow /Next links indefinitely when a writing code path inserts a child, producing an infinite loop. This issue is fixed in version 6.16.0.
Timeline
Published 2026-09-01
Modified 2026-09-09
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-84309Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-84309Censys host search filtered to this CVE id.
grep.app
CVE-2026-84309Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-84309GitHub code search for direct mentions.
Google dork
"CVE-2026-84309" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (1)
We haven't classified any articles referencing CVE-2026-84309 yet. The external references above still apply.