CVE-2026-22184— zlib <= 1.3.1.2 untgz Global Buffer Overflow in TGZfname()
Quick assessment
Affected
zlib software zlib
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
zlib是美国Mark Adler个人开发者的一个通用的数据压缩库。 zlib 1.3.1.2及之前版本存在安全漏洞，该漏洞源于TGZfname函数存在全局缓冲区溢出，可能导致内存损坏、拒绝服务或代码执行。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| zlib software | zlib | ≤ 1.3.1.2 |
affected |
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I. Basic Information for CVE-2026-22184
Vulnerability Information
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Vulnerability Title
zlib <= 1.3.1.2 untgz Global Buffer Overflow in TGZfname()
Source: CVE Program / CVE List V5
Vulnerability Description
zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz. The vulnerability is limited to the standalone demonstration utility and does not affect the core zlib compression library. The flaw occurs when a user executes the untgz command with an excessively long archive name supplied via the command line, leading to an out-of-bounds write in a fixed-size global buffer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
zlib 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zlib是美国Mark Adler个人开发者的一个通用的数据压缩库。 zlib 1.3.1.2及之前版本存在安全漏洞，该漏洞源于TGZfname函数存在全局缓冲区溢出，可能导致内存损坏、拒绝服务或代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| zlib software | zlib | 0 ~ 1.3.1.2 | - |
|
II. Public POCs for CVE-2026-22184
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2026-22184 (1)
Vendor Pages for CVE-2026-22184 (1)
Other References for CVE-2026-22184 (2)
-
https://www.vulncheck.com/advisories/zlib-untgz-global-buffer-overflow-in-tgzfname third-party-advisory
-
https://zlib.net/ product
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V. Comments for CVE-2026-22184
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