CVE-2026-56748 | Improper validation of symbolic links in the Pack Git import… | CVSS 8.8 HIGH

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.

Metadata

CVE ID: CVE-2026-56748
State: PUBLISHED
Assigner: Cribl
Reserved: 2026-06-22 20:02 UTC
Published: 2026-07-27 19:27 UTC
Last updated: 2026-07-27 20:22 UTC
Primary CWE: CWE-61
CWE-61: UNIX Symbolic Link ('Symlink') Following
Vendor / Product: Cribl / Cribl Stream
Sources: cve.org · NVD

Severity & Metrics

8.8 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Cribl	Cribl Stream	—	0 < 4.18.2

Weakness (CWE)

CWE	Source	Description
CWE-61	cna	CWE-61: UNIX Symbolic Link ('Symlink') Following

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.8	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (2)

Cribl Stream 4.18.2 Security Fixes https://docs.cribl.io/stream/release-notes/release-v4182/#security-fixes
Cribl Trust Portal https://trust.cribl.io/notifications