CVE-2026-56748
Authenticated RCE via Symlink Following in Cribl Stream Pack Git Import
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.
INFO
Published Date :
July 27, 2026, 8:16 p.m.
Last Modified :
July 27, 2026, 9:17 p.m.
Remotely Exploit :
Yes !
Source :
af879a92-7297-456a-bb0e-905ac6c64bdc
Affected Products
The following products are affected by CVE-2026-56748
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | af879a92-7297-456a-bb0e-905ac6c64bdc | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 4.0 | HIGH | af879a92-7297-456a-bb0e-905ac6c64bdc | ||||
| CVSS 4.0 | HIGH | af879a92-7297-456a-bb0e-905ac6c64bdc |
Solution
- Update Cribl Stream to version 4.18.2 or later.
- Apply vendor-provided patches if available.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-56748.
| URL | Resource |
|---|---|
| https://docs.cribl.io/stream/release-notes/release-v4182/#security-fixes | |
| https://trust.cribl.io/notifications |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-56748 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-56748
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-56748 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-56748 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 27, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-56748', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-27T20:22:29.574661Z'} -
New CVE Received by af879a92-7297-456a-bb0e-905ac6c64bdc
Jul. 27, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Cribl', 'product': 'Cribl Stream', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '4.18.2', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-61 Added Reference https://docs.cribl.io/stream/release-notes/release-v4182/#security-fixes Added Reference https://trust.cribl.io/notifications