CloudFlare Zlib
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By the Year
In 2026 there have been 0 vulnerabilities in CloudFlare Zlib. Zlib did not have any published security vulnerabilities last year.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 0 | 0.00 |
| 2025 | 0 | 0.00 |
| 2024 | 1 | 5.50 |
It may take a day or so for new Zlib vulnerabilities to show up in the stats or in the list of recent security vulnerabilities. Additionally vulnerabilities may be tagged under a different product or component name.
Recent CloudFlare Zlib Security Vulnerabilities
Cloudflare zlib Deflate Heap Buffer Overflow
CVE-2023-6992
5.5 - Medium
- January 04, 2024
Cloudflare version of zlib library was found to be vulnerable to memory corruption issues affecting the deflation algorithm implementation (deflate.c). The issues resulted from improper input validation and heap-based buffer overflow. A local attacker could exploit the problem during compression using a crafted malicious file potentially leading to denial of service of the software. Patches: The issue has been patched in commit 8352d10 https://github.com/cloudflare/zlib/commit/8352d108c05db1bdc5ac3bdf834dad641694c13c . The upstream repository is not affected.
Memory Corruption
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