CVE•Published 2023-10-14•Modified 2026-10-15•1 article on news•6 live references•NVD data
CVE-2023-45853Zlib · Zlib
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
88
Exploit Prediction Scoring System · top 12% of all CVEs
Weaknesses (CWE)
Description
MiniZip in zlib through 1.3 has an integer overflow and resultant heap-based buffer overflow in zipOpenNewFileInZip4_64 via a long filename, comment, or extra field. NOTE: MiniZip is not a supported part of the zlib product. NOTE: pyminizip through 0.2.6 is also vulnerable because it bundles an affected zlib version, and exposes the applicable MiniZip code through its compress API.
Timeline
Published 2023-10-14
Modified 2026-10-15
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).
Shodan · vuln tag0 hosts
vuln:CVE-2023-45853Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Zlib Zlib"All exposed Zlib Zlib instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Zlib"HTTP body or banner mentions "Zlib" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2023-45853Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2023-45853Censys host search filtered to this CVE id.
grep.app
CVE-2023-45853Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2023-45853GitHub code search for direct mentions.
Google dork
"CVE-2023-45853" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2023-45853 on GitHub.