Is CVE-2026-56748 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-56748 being exploited in the wild.

How severe is CVE-2026-56748?

High severity, with a CVSS score of 8.8, published 27 July 2026.

Is there a fix for CVE-2026-56748?

A patch was published on 2026-06-24: Release date of version 4.18.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-56748 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-56748?

Check whether you run Cribl Stream at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-56748: Cribl Stream remote code execution via Pack Git import symlink following

CVE-2026-56748 · Severity: high · CVSS 8.8 · Published 2026-07-27

Cribl Stream, a data processing engine used to route and transform machine data, is vulnerable to a security flaw in its Pack Git import feature. An attacker with specific permissions could use a specially crafted Git repository to execute malicious code on the server. This could lead to a complete takeover of the Cribl server, potentially resulting in data theft, service disruption, or unauthorized access to sensitive corporate data flows.

Technologies: Cribl Stream. Vendors: Cribl.

Quick answers

Is CVE-2026-56748 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-56748 being exploited in the wild.
How severe is CVE-2026-56748?: High severity, with a CVSS score of 8.8, published 27 July 2026.
Which products and versions are affected?: Cribl Stream before 4.18.2.
Is there a fix for CVE-2026-56748?: A patch was published on 2026-06-24: Release date of version 4.18.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-56748 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-56748?: Check whether you run Cribl Stream at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A symbolic link (symlink) following vulnerability exists in the Pack Git import feature of Cribl Stream. The root cause is improper validation of symlinks within a pack's directory structure, specifically within the functions directory. An authenticated remote attacker with 'Pack import' and 'pipeline preview' permissions can exploit this by importing a crafted Git repository containing malicious symlinks. Successful exploitation allows the attacker to achieve arbitrary code execution (RCE) with the privileges of the Cribl server process. The issue is resolved in Cribl Stream version 4.18.2, which now blocks packs containing symlinks during the import process.

Affected products

Cribl Cribl Stream before 4.18.2

Timeline

2026-06-24: patched: Release date of version 4.18.2
2026-07-27: advisory: CVE published

References

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