CVE-2026-76905Public exploitNetwork attack vector

Unauthenticated denial of service via nil-pointer dereference

Published Aug 21, 2026 · Updated Aug 25, 2026

Denial of service in getkin kin-openapi 0.10.0 through 0.140.0 allows remote attackers to interrupt service via malformed multipart data. openapi3filter.convertParseError dereferences RequestError.Parameter.In without a nil check after the multipart decoder nests a scalar ParseError inside a body error whose Parameter is nil. Exposure requires a non-string scalar multipart field and ConvertErrors or ValidationErrorEncoder; JSON-only integrations and recovery-bounded handlers avoid process-wide interruption.

CVSS severity7.5
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in getkin kin-openapi 0.10.0 through 0.140.0 allows remote attackers to interrupt service via malformed multipart data. openapi3filter.convertParseError dereferences RequestError.Parameter.In without a nil check after the multipart decoder nests a scalar ParseError inside a body error whose Parameter is nil. Exposure requires a non-string scalar multipart field and ConvertErrors or ValidationErrorEncoder; JSON-only integrations and recovery-bounded handlers avoid process-wide interruption.

The record

CVE
CVE-2026-76905
Published
Aug 21, 2026
Updated
Aug 25, 2026
Vendor
getkin
Product
kin-openapi
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.10.0, < 0.141.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

getkin · kin-openapiversion=>= 0.10.0, < 0.141.0

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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