CVE-2026-73502

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (41st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
5.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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 v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 24, 2026

Last Modified

September 18, 2026

Advisory Details (3)

Auto-updated Aug 18, 2026
Patch available. Sources: github, github_commit, github_release.
GitHub release Patch Available

v0.144.0

Patch available: getkin/kin-openapi v0.144.0

https://github.com/getkin/kin-openapi/releases/tag/v0.144.0
GitHub commit Patch Available

commit 68ac2affa325 (getkin/kin-openapi)

Patch available: getkin/kin-openapi v0.144.0 (contains commit 68ac2affa325)

https://github.com/getkin/kin-openapi/commit/68ac2affa325514d7d6e731204d6a1edf6bdff64
GitHub advisoryMentions a patch (unverified)

openapi3filter: unauthenticated nil-pointer panic when validating a request against a `content` parameter whose media type has no schema · Advisory · getkin/kin-openapi · GitHub

https://github.com/getkin/kin-openapi/security/advisories/GHSA-jpcw-4wr7-c3vq

Vendor Advisories for CVE-2026-73502(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-getkin-kin-openapi0.110.0-1 ... 0.135.0-1 (10 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-getkin-kin-openapi0.124.0-1, 0.135.0-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-getkin-kin-openapi0.124.0-1, 0.135.0-1
  • every version on: no fix on record
—
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/getkin/kin-openapi—
  • every version up to 0.144.0: fixed in 0.144.0
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 86 are merged into the row they repeat.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-10-12 15:40 UTCEG score recompute
  4. 2026-10-11 19:26 UTCEG score recompute
  5. 2026-10-11 16:42 UTCEG score recompute
  6. 2026-10-11 14:01 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-10-04 07:41 UTCEG score recompute
  16. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  17. 2026-10-02 19:42 UTCEG score recompute
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  19. 2026-10-01 04:31 UTCEG score recompute
  20. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  21. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-09-28 04:25 UTCEG score recompute
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  25. 2026-09-25 09:59 UTCEG score recompute
Show 59 more
  1. 2026-09-23 22:16 UTCEG score recompute
  2. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  3. 2026-09-22 22:09 UTCEG score recompute
  4. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  5. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  6. 2026-09-20 01:39 UTCEG score recompute
  7. 2026-09-18 20:35 UTCEG score recompute
  8. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  9. 2026-09-18 03:24 UTCEG score recompute
  10. 2026-09-17 05:28 UTCEG score recompute
  11. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  12. 2026-09-16 07:31 UTCEG score recompute
  13. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  14. 2026-09-15 09:34 UTCEG score recompute
  15. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  16. 2026-09-14 10:24 UTCEG score recompute
  17. 2026-09-13 12:28 UTCEG score recompute
  18. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  19. 2026-09-11 16:35 UTCEG score recompute
  20. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  21. 2026-09-10 13:33 UTCEG score recompute
  22. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  23. 2026-09-09 08:43 UTCEG score recompute
  24. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  25. 2026-09-07 21:23 UTCEG score recompute
  26. 2026-09-06 17:25 UTCEG score recompute
  27. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  28. 2026-09-05 19:22 UTCEG score recompute
  29. 2026-09-04 12:44 UTCEG score recompute
  30. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  31. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  32. 2026-09-01 23:15 UTCEG score recompute
  33. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  34. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  35. 2026-08-30 22:12 UTCEG score recompute
  36. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  37. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  38. 2026-08-30 00:14 UTCEG score recompute
  39. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  40. 2026-08-28 02:52 UTCEG score recompute
  41. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  42. 2026-08-27 04:54 UTCEG score recompute
  43. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  44. 2026-08-26 06:52 UTCEG score recompute
  45. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  46. 2026-08-25 08:32 UTCEG score recompute
  47. 2026-08-24 10:16 UTCEG score recompute
  48. 2026-08-23 12:19 UTCEG score recompute
  49. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  50. 2026-08-22 14:23 UTCEG score recompute
  51. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  52. 2026-08-21 16:12 UTCEG score recompute
  53. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  54. 2026-08-19 20:16 UTCEG score recompute
  55. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  56. 2026-08-18 19:25 UTCEG score recompute
  57. 2026-08-18 18:44 UTCEG score recompute
  58. 2026-08-18 18:25 UTCEG score recompute
  59. 2026-08-12 22:21 UTCEG score recomputeFirst assessed: 5.3 MEDIUM

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-73502?
CVE-2026-73502 is a medium-severity vulnerability; its CVE record was published on July 24, 2026. 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…
When was the CVE record for CVE-2026-73502 published?
The CVE record for CVE-2026-73502 was published on July 24, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 18, 2026; the record at its source may have been updated since.
Is CVE-2026-73502 actively exploited?
CVE-2026-73502 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73502?
CVE-2026-73502 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73502?
A fix for CVE-2026-73502 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73502 are linked in the Vendor Advisories panel on this page.

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