# CVE-2026-27775 — Gitea Open Source Git Server

> As of 2026-07-06, CVE-2026-27775 is a HIGH-severity vulnerability in Gitea Open Source Git Server, CVSS v3.1 8.8, EPSS 0.5% (40.5th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-27775, most recently “Threat Actors Mass-Probe Gitea Docker Deployments for CVE-2026-20896 Authentication Bypass Amid Exploitarium Zero-Day Leak Wave”.

**Last updated:** 2026-07-06

## What is CVE-2026-27775?

Gitea 1.25.5 caches a branch-specific write-permission result across multiple refs in one pre-receive hook session, allowing a per-branch maintainer-edit grant to be reused for other refs and escalate to full repository write access.

The record classifies CVE-2026-27775 under weakness class [CWE-863](https://cwe.mitre.org/data/definitions/863.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 72 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.8 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.5% probability of exploitation in the next 30 days, higher than 40.5% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-03, last modified 2026-07-06

## Is CVE-2026-27775 being exploited?

No public exploitation evidence for CVE-2026-27775 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-07-06. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **Gitea**: Open Source Git Server

## How to fix CVE-2026-27775

No vendor patch reference has been recorded for CVE-2026-27775 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-27775

1 tracked threat in the Threadlinqs corpus references CVE-2026-27775, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Threat Actors Mass-Probe Gitea Docker Deployments for CVE-2026-20896 Authentication Bypass Amid Exploitarium Zero-Day Leak Wave](https://intel.threadlinqs.com/threat/TL-2026-1136) — CRITICAL · 2026-07-06

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-07-07. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — vendor advisory](https://github.com/go-gitea/gitea/security/advisories/GHSA-649p-mmhf-85c7)
- [github.com — patch](https://github.com/go-gitea/gitea/pull/38151)
- [github.com — release notes](https://github.com/go-gitea/gitea/releases/tag/v1.26.3)
- [blog.gitea.com — release notes](https://blog.gitea.com/release-of-1.26.3-and-1.26.4/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-27775
Full detection coverage and IOCs for threats exploiting CVE-2026-27775 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp