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CVE-2026-32288— Unbounded allocation for old GNU sparse in archive/tar

Quick assessment

Affected
Go standard library archive/tar
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.

Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于读取包含大量稀疏区域编码的恶意存档时可能分配无限内存。

AI Predicted 5.3 Difficulty: Easy EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-32288

Vulnerability Information
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Vulnerability Title
Unbounded allocation for old GNU sparse in archive/tar
Source: CVE Program / CVE List V5
Vulnerability Description
tar.Reader can allocate an unbounded amount of memory when reading a maliciously-crafted archive containing a large number of sparse regions encoded in the "old GNU sparse map" format.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Google Go 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于读取包含大量稀疏区域编码的恶意存档时可能分配无限内存。
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
Go standard library archive/tar 0 ~ 1.25.9 -

II. Public POCs for CVE-2026-32288

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III. Intelligence Information for CVE-2026-32288

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Patches & Fixes for CVE-2026-32288 (1)

Vendor Advisories for CVE-2026-32288 (1)

Same Patch Batch · Go standard library · 2026-04-08 · 7 CVEs total

CVE-2026-32282 TOCTOU permits root escape on Linux via Root.Chmod in os in internal/syscall/unix
CVE-2026-32280 Unexpected work during chain building in crypto/x509
CVE-2026-32289 JsBraceDepth Context Tracking Bugs (XSS) in html/template
CVE-2026-32281 Inefficient policy validation in crypto/x509
CVE-2026-32283 Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS
CVE-2026-33810 Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509

IV. Related Vulnerabilities

Same product: archive/tar
Same vendor: Go standard library

V. Comments for CVE-2026-32288

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