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CVE-2026-58472— GNU Wget 1.25.0 Heap Buffer Overflow via HTML Attribute Encoding

Quick assessment

Affected
gnuwget wget
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.

GNU wget是美国GNU基金会开源的一个文件下载工具。 GNU wget 1.25.0及之前版本存在数字错误漏洞，该漏洞源于html_quote_string函数中堆缓冲区溢出，允许远程攻击者通过提供特制的HTML属性触发内存损坏，导致整数溢出和后续的堆缓冲区溢出。

CVSS 5.9 · Medium EPSS 0.22% · P13

Affected Version Matrix 2

VendorProduct Version RangeStatus
gnuwget wget ≤ 1.25.0 affected
dd692d9cea5335b181d877ae917fe6e75587a812 unaffected
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I. Basic Information for CVE-2026-58472

Vulnerability Information
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Vulnerability Title
GNU Wget 1.25.0 Heap Buffer Overflow via HTML Attribute Encoding
Source: CVE Program / CVE List V5
Vulnerability Description
GNU Wget through 1.25.0, fixed in commit dd692d9, contains a heap buffer overflow vulnerability in the html_quote_string() function in src/convert.c that allows a remote attacker to trigger memory corruption by supplying a crafted HTML attribute with a large number of characters requiring entity encoding. A server-supplied HTML attribute causes a signed integer counter to overflow during output size accumulation, resulting in an undersized heap allocation and subsequent heap buffer overflow during the copy phase.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
GNU wget 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNU wget是美国GNU基金会开源的一个文件下载工具。 GNU wget 1.25.0及之前版本存在数字错误漏洞，该漏洞源于html_quote_string函数中堆缓冲区溢出，允许远程攻击者通过提供特制的HTML属性触发内存损坏，导致整数溢出和后续的堆缓冲区溢出。
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
gnuwget wget 0 ~ 1.25.0 -

II. Public POCs for CVE-2026-58472

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III. Intelligence Information for CVE-2026-58472

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Patches & Fixes for CVE-2026-58472 (1)

Vendor Advisories for CVE-2026-58472 (1)

Same Patch Batch · gnuwget · 2026-07-07 · 4 CVEs total

CVE-2026-58469 7.5 HIGH GNU Wget 1.25.0 Heap Buffer Underread via Metalink URL Parsing
CVE-2026-58471 5.9 MEDIUM GNU Wget 1.25.0 Heap Buffer Overflow via convert_fname() in url.c
CVE-2026-58470 5.3 MEDIUM GNU Wget 1.25.0 Integer Overflow via Content-Range Header Parsing

IV. Related Vulnerabilities

Same product: wget
Same vendor: gnuwget
Same weakness: CWE-190

V. Comments for CVE-2026-58472

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