CVE-2026-20912Network attack vectorHinoki check available

Authenticated attachment deletion via repository-context mismatch

Published Jan 22, 2026 · Updated Jan 22, 2026

Missing authorization in Gitea 1.25.3 and earlier allows remote authenticated users to delete attachments through repository-scoped requests. The DeleteAttachment handler trusts uploader identity without first confirming that attach.RepoID matches the repository in the request context. The CNA describes public disclosure through cross-repository release linking, but its linked patch instead verifies repository identity and issue, release, or owner write authority before deletion.

CVSS severity9.1
Critical
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in Gitea 1.25.3 and earlier allows remote authenticated users to delete attachments through repository-scoped requests. The DeleteAttachment handler trusts uploader identity without first confirming that attach.RepoID matches the repository in the request context. The CNA describes public disclosure through cross-repository release linking, but its linked patch instead verifies repository identity and issue, release, or owner write authority before deletion.

The record

CVE
CVE-2026-20912
Published
Jan 22, 2026
Updated
Jan 22, 2026
Vendor
Gitea
Product
Gitea
Classifications
CWE-283, CWE-639, CWE-284, T1485
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 22, 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 <=1.25.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Gitea · Giteaversion=0 <=1.25.3

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.1redhat-SADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-283Unverified Ownership
CWE-639Authorization Bypass Through User-Controlled Key
CWE-284Improper Access Control
T1485Data Destruction

Public exploit references

No public exploit references are available in this record.

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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