Detections
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Echo: ajv: security update to 8.17.1+echo.1

medium Tenable Cloud Security Plugin ID 460694

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - ajv (Another JSON Schema Validator) before 8.18.0 is vulnerable to Regular Expression Denial of Service
 (ReDoS) when the $data option is enabled. The pattern keyword accepts runtime data via JSON Pointer syntax
 ($data reference), which is passed directly to the JavaScript RegExp() constructor without validation. An
 attacker can inject a malicious regex pattern (e.g., "^(a|a)*$") combined with crafted input to cause
 catastrophic backtracking. A 31-character payload causes approximately 44 seconds of CPU blocking, with
 each additional character doubling execution time. This enables complete denial of service with a single
 HTTP request against any API using ajv with $data: true for dynamic schema validation. This issue is also
 fixed in version 6.14.0. (CVE-2025-69873)

Solution

Update the ajv library and its related packages to version 8.17.1+echo.1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-69873

Plugin Details

Severity: Medium

ID: 460694

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.74

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2025-69873

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/28/2026

Vulnerability Publication Date: 2/11/2026

Reference Information

CVE: CVE-2025-69873