CVE-2026-78433Network attack vectorHinoki check available

Private attachment disclosure via date-gated ownership checks

Published Oct 14, 2026 · Updated Oct 14, 2026

Gitea 1.26.0 through 1.27.2 attachment authorization lets remote attackers read private files through public repository URLs. In routers/web/repo/attachment.go, attachments created before January 16, 2026 skip the ownership guard, so permissions are evaluated against the URL's repository instead of the attachment's owner. Anonymous access requires a known random attachment UUID and a public repository; disclosure covers issue and pull request attachments and release assets.

CVSS severity5.9
Medium
EPSS probability0.37%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Gitea 1.26.0 through 1.27.2 attachment authorization lets remote attackers read private files through public repository URLs. In routers/web/repo/attachment.go, attachments created before January 16, 2026 skip the ownership guard, so permissions are evaluated against the URL's repository instead of the attachment's owner. Anonymous access requires a known random attachment UUID and a public repository; disclosure covers issue and pull request attachments and release assets.

The record

CVE
CVE-2026-78433
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
Gitea
Product
Gitea
Classifications
CWE-1220, CWE-863, CWE-284, CWE-639, T1213
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 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=1.26.0 <=1.27.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gitea · Giteaversion=1.26.0 <=1.27.2

Published CVSS scores

5.9GiteaCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1220Insufficient Granularity of Access Control
CWE-863Incorrect Authorization
CWE-284Improper Access Control
CWE-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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