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CVE-2026-56748— Authenticated RCE via Symlink Following in Cribl Stream Pack Git Import

Quick assessment

Affected
Cribl Cribl Stream
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.

cribl Cribl Stream是cribl公司的数据流处理平台。 Cribl Stream 4.18.2之前版本存在后置链接漏洞，该漏洞源于符号链接验证不当，可能导致远程认证攻击者执行任意代码。

CVSS 8.8 · High EPSS 0.92% · P60

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cribl Cribl Stream < 4.18.2 affected
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I. Basic Information for CVE-2026-56748

Vulnerability Information
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Vulnerability Title
Authenticated RCE via Symlink Following in Cribl Stream Pack Git Import
Source: CVE Program / CVE List V5
Vulnerability Description
Improper validation of symbolic links in the Pack Git import feature in Cribl Stream before 4.18.2 allows a remote authenticated attacker with Pack import and pipeline preview permissions to execute arbitrary code as the Cribl server process via a crafted Git repository containing a symbolic link in the pack's functions directory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-61
Source: CVE Program / CVE List V5
Vulnerability Title
Cribl Stream 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
cribl Cribl Stream是cribl公司的数据流处理平台。 Cribl Stream 4.18.2之前版本存在后置链接漏洞，该漏洞源于符号链接验证不当，可能导致远程认证攻击者执行任意代码。
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
Cribl Cribl Stream 0 ~ 4.18.2 -

II. Public POCs for CVE-2026-56748

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III. Intelligence Information for CVE-2026-56748

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Vendor Advisories for CVE-2026-56748 (1)

Vendor Pages for CVE-2026-56748 (1)

IV. Related Vulnerabilities

Same product: Cribl Stream
Same vendor: Cribl
Same weakness: CWE-61

V. Comments for CVE-2026-56748

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