CVE-2026-56747: Improper control of generation of code in the JSON Pointer-to-accessor compiler in Cribl Stream before 4.18.2

Q: How do I fix CVE-2026-56747?

cribl stream: upgrade to 4.18.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-56747 being exploited?

CVE-2026-56747 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-56747 affect?

CVE-2026-56747 affects cribl stream. Severity is high (CVSS 8.8). 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 c

This month

HIGH 8.8UPGRADE

CVE-2026-56747 is a high-severity flaw (CVSS 8.8) affecting cribl stream. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-07-27
Last modified	2026-10-24

Publisher (CNA): Cribl · Vendor: cribl

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-27 20:16 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

cribl cribl stream UPGRADE

Affected: < 4.18.2

Fixed in: 4.18.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cribl-stream || rpm -q cribl-stream || cribl-stream --version

2. UPGRADE to 4.18.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cribl-stream

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cribl-stream

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · gnome-shell-extension-tiling-assistant · FIXED · 56-1.fc46 · FEDORA-2026-ebf66a5321 · source

sudo dnf upgrade --advisory=FEDORA-2026-ebf66a5321

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-56747?

cribl stream: upgrade to 4.18.2. Exact commands for each OS are on this page.

Is CVE-2026-56747 being exploited?

CVE-2026-56747 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-56747 affect?

CVE-2026-56747 affects cribl stream. Severity is high (CVSS 8.8). 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 c

How urgent is CVE-2026-56747?

Priority 44/100. High severity

Related CVEs

CVE-2026-56748 HIGH 8.8 UPGRADE Improper validation of symbolic links in the Pack Git import feature in Cribl Stream before 4.18.2 allows a re

References

← Back to latest CVEs