How severe is CVE-2026-56748?

CVE-2026-56748 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-56748 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-56748?

CVE-2026-56748 affects Cribl Cribl Stream. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-56748?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-56748 published?

CVE-2026-56748 was published on 2026-07-27 and last updated on 2026-08-20.

CVE-2026-56748

CVE-2026-56748 is a high-severity vulnerability in Cribl Cribl Stream with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-61.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-61
Affected product: Cribl Cribl Stream
Published: 2026-07-27
Last modified: 2026-08-20

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.

Frequently asked questions

What is CVE-2026-56748?: 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.
How severe is CVE-2026-56748?: CVE-2026-56748 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-56748 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-56748?: CVE-2026-56748 affects Cribl Cribl Stream. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-56748?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-56748 published?: CVE-2026-56748 was published on 2026-07-27 and last updated on 2026-08-20.

References

Affected products (1)

cpe:2.3:a:cribl:cribl_stream:*:*:*:*:*:*:*:*

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