CVE•Published 2026-09-05•Modified 2026-09-08•0 articles on news•5 live references•NVD data
CVE-2026-86143
Vulnerability data via NVD (ingested)
CVSS v3.1
6.9
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
EPSS percentile
2
Exploit Prediction Scoring System · top 98% of all CVEs
Weaknesses (CWE)
Description
In xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.
Timeline
Published 2026-09-05
Modified 2026-09-08
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-2026-86143Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-86143Censys host search filtered to this CVE id.
grep.app
CVE-2026-86143Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-86143GitHub code search for direct mentions.
Google dork
"CVE-2026-86143" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-86143 on GitHub.
We haven't classified any articles referencing CVE-2026-86143 yet. The external references above still apply.