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CVE-2026-7260— Stack overflow in phar with circular symlinks

Quick assessment

Affected
PHP Group PHP
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.

php group php是php group团队开源的一种服务器端脚本语言。 php.net The PHP Interpreter 8.2.33版本之前的8.2.x版本、8.3.33版本之前的8.3.x版本、8.4.24版本之前的8.4.x版本和8.5.9版本之前的8.5.x版本存在缓冲区错误漏洞，该漏洞源于phar归档中的循环符号链接导致无界递归，耗尽C栈并导致PHP进程崩溃。

CVSS 5.4 · Medium EPSS 0.15% · P3

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 4

VendorProduct Version RangeStatus
PHP Group PHP 8.2.*< 8.2.33 affected
8.3.*< 8.3.33 affected
8.4.*< 8.4.24 affected
8.5.*< 8.5.9 affected
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I. Basic Information for CVE-2026-7260

Vulnerability Information
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Vulnerability Title
Stack overflow in phar with circular symlinks
Source: CVE Program / CVE List V5
Vulnerability Description
Circular symbolic links in phar archives could lead to unbounded recursion, exhausting the C stack and crashing the PHP process, in PHP versions from 8.2.* before 8.2.33, from 8.3.* before 8.3.33, from 8.4.* before 8.4.24, and from 8.5.* before 8.5.9.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
php.net The PHP Interpreter 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
php group php是php group团队开源的一种服务器端脚本语言。 php.net The PHP Interpreter 8.2.33版本之前的8.2.x版本、8.3.33版本之前的8.3.x版本、8.4.24版本之前的8.4.x版本和8.5.9版本之前的8.5.x版本存在缓冲区错误漏洞，该漏洞源于phar归档中的循环符号链接导致无界递归，耗尽C栈并导致PHP进程崩溃。
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
PHP Group PHP 8.2.* ~ 8.2.33 -

II. Public POCs for CVE-2026-7260

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III. Intelligence Information for CVE-2026-7260

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Vendor Advisories for CVE-2026-7260 (1)

Same Patch Batch · PHP Group · 2026-07-30 · 3 CVEs total

CVE-2026-17544 8.1 HIGH Out-of-bounds write in bccomp() via crafted operand and scale
CVE-2026-17543 8.1 HIGH SQL injection in ext-pgsql via E'...' backslash breakout

IV. Related Vulnerabilities

Same product: PHP
Same vendor: PHP Group
Same weakness: CWE-121

V. Comments for CVE-2026-7260

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