CVE-2026-56748

HIGH 8.8

Authenticated RCE via Symlink Following in Cribl Stream Pack Git Import

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-61
Vendor	cribl
Product	cribl stream
Published	Jul 27, 2026
Last Updated	Jul 27, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Cribl / Cribl Stream

0 < 4.18.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

docs.cribl.io: https://docs.cribl.io/stream/release-notes/release-v4182/#security-fixes trust.cribl.io: https://trust.cribl.io/notifications

Credits

Robert Lackey, Cribl Product Security