2.9

CVE-2025-69873: ajv.js ajv

Deferred
AliasesUBUNTU-CVE-2025-69873DEBIAN-CVE-2025-69873CGA-22q5-7r4f-4xvf
Published 11-02-2026Last modified 14-09-2026

Vulnerability summary

CVE-2025-69873 is a low (CVSS 2.9) vulnerability in ajv.js ajv. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 45.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 2.9, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
2.9/10
010
Low · v3.1 (CVE.org)
EPSS score
0.55%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 1
RHSA-2026:13512RHSA-2026:33371RHSA-2026:6277CGA-PJX7-R22P-CR2C

Timeline

  1. 11-02-2026
    PublishedVulnerability first disclosed.
  2. 14-09-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

7 scores · 7 sources · 2 versions

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.51% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard108 products
  • arangodb-3.11< 3.11.14.3-r0
  • arangodb-3.12< 3.12.7.2-r1 | < 3.12.7.2-r2
  • argo-workflows-ui-3.6< 3.6.19-r2
  • argo-workflows-ui-3.7< 3.7.10-r3
  • argo-workflows-ui-4.0< 4.0.1-r2
Wolfi31 products
  • argo-workflows-ui-3.7< 3.7.10-r3
  • argo-workflows-ui-4.0< 4.0.1-r2
  • eslint< 10.0.2-r0
  • jupyter-base-notebook< 7.6.3-r2
  • katib-earlystopping< 0.19.0-r31
Ajv.js1 product
  • ajv< 6.14.0 | ≥ 7.0.0, < 8.17.2
Debian1 product
  • node-ajvAll versions (No fix recorded) | < 8.18.0~ds+~cs6.1.1-1
Npm1 product
  • ajv≥ 7.0.0-alpha.0, < 8.18.0 | < 6.14.0
Ubuntu1 product
  • node-ajvAll versions (No fix recorded)

6 vendors · 143 products

References

46 links
Show all 46 references