How severe is CVE-2026-56747?

CVE-2026-56747 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-2026-56747 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-56747?

CVE-2026-56747 affects Cribl Cribl Stream. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-56747?

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-2026-56747 published?

CVE-2026-56747 was published on 2026-07-27 and last updated on 2026-08-20.

CVE-2026-56747

CVE-2026-56747 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-94.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Cribl Cribl Stream
Published: 2026-07-27
Last modified: 2026-08-20

Description

Improper control of generation of code in the JSON Pointer-to-accessor compiler in Cribl Stream before 4.18.2 allows a remote authenticated attacker with edit privileges to execute arbitrary JavaScript on the server via a crafted database connection identifier or pack configuration value.

Frequently asked questions

What is CVE-2026-56747?: Improper control of generation of code in the JSON Pointer-to-accessor compiler in Cribl Stream before 4.18.2 allows a remote authenticated attacker with edit privileges to execute arbitrary JavaScript on the server via a crafted database connection identifier or pack configuration value.
How severe is CVE-2026-56747?: CVE-2026-56747 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-2026-56747 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-56747?: CVE-2026-56747 affects Cribl Cribl Stream. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-56747?: 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-2026-56747 published?: CVE-2026-56747 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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