CVE-2026-27775Public exploitNetwork attack vector

Authenticated repository write escalation via branch permission cache

Published Jul 3, 2026 · Updated Jul 3, 2026

Incorrect authorization in Gitea 1.25.5 allows remote authenticated users to gain full repository write access through a multi-ref push. CanWriteCode() caches the first branch-specific CanMaintainerWriteToBranch result for the entire pre-receive session and reuses it after the branch name changes. Exploitation requires a victim-enabled maintainer-edit grant on one pull-request branch; the reused grant permits protected-branch overwrites, new branches, and tags in that repository.

CVSS severity8.8
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Gitea 1.25.5 allows remote authenticated users to gain full repository write access through a multi-ref push. CanWriteCode() caches the first branch-specific CanMaintainerWriteToBranch result for the entire pre-receive session and reuses it after the branch name changes. Exploitation requires a victim-enabled maintainer-edit grant on one pull-request branch; the reused grant permits protected-branch overwrites, new branches, and tags in that repository.

The record

CVE
CVE-2026-27775
Published
Jul 3, 2026
Updated
Jul 3, 2026
Vendor
Gitea
Product
Gitea
Classifications
CWE-863, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 3, 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=1.25.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Gitea · Giteaversion=1.25.5

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1565.001Stored Data Manipulation

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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