5.3

CVE-2026-73502: getkin kin-openapi NULL Pointer Dereference

CVSS: 5.3v3.1MediumDeferred
AliasesUBUNTU-CVE-2026-73502DEBIAN-CVE-2026-73502CGA-2fg5-q9q7-xqc2
Published 18-08-2026Last modified 18-08-2026
Open JSON

Vulnerability summary

CVE-2026-73502 is a medium (CVSS 5.3) NULL Pointer Dereference vulnerability in getkin kin-openapi. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 41.9% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.51%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 3
OPENSUSE-SU-2026:21761-1SUSE-SU-2026:23625-1CGA-3RV7-4634-JP9C

Timeline

  1. 18-08-2026
    PublishedVulnerability first disclosed.
  2. 18-08-2026
    Last modifiedVulnerability information updated.

Description

kin-openapi is a Go project for handling OpenAPI files. From 0.2.0 until 0.144.0, openapi3filter.ValidateRequest can encounter a NULL-pointer-dereference denial of service when an operation declares a content parameter whose application/json media type has no schema. In openapi3filter/req_resp_decoder.go, the default defaultContentParameterDecoder dereferences mt.Schema.Value without checking whether mt.Schema is nil, even though doc.Validate() accepts the document under OpenAPI 3.0.x and 3.1.x. A single unauthenticated request supplying the parameter value can panic request validation, causing an aborted request with log growth in the common synchronous net/http path or a full process crash in integrations without recovery. This issue is fixed in version 0.144.0.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.51%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

+0.06 pp

From 0.45% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.51%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard200 products
  • commercial-grafana-11.6All versions (No fix recorded)
  • commercial-grafana-12.1All versions (No fix recorded)
  • commercial-grafana-12.2All versions (No fix recorded)
  • commercial-grafana-12.3All versions (No fix recorded)
  • commercial-grafana-12.4< 12.4.10-r0

1 vendor · 200 products · Showing 200 of 496. Use Open JSON for the complete list.

References

9 links