# CVE-2026-58426 — Gitea Open Source Git Server

> As of 2026-07-06, CVE-2026-58426 is a CRITICAL-severity vulnerability in Gitea Open Source Git Server, CVSS v3.1 9.6, EPSS 0.3% (21.0th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-58426, most recently “Gitea CVE-2026-58443: Authorization Bypass in Pull Request Update API Enables Private Repo Access”.

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

## What is CVE-2026-58426?

Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write

The record classifies CVE-2026-58426 under weakness class [CWE-347](https://intel.threadlinqs.com/cwe/CWE-347). 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. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 109 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.6 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 21.0% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 7.6/10 — 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-2026-58426 being exploited?

Weaponised exploit code for CVE-2026-58426 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 23 in the Threadlinqs vulnerability feed.

- [trickest/cve](https://github.com/trickest/cve/blob/main/2026/CVE-2026-58426.md) (trickest)

## Affected products and versions

- [Gitea](https://intel.threadlinqs.com/vendors/gitea): Open Source Git Server

Affected software packages:

- `go:code.gitea.io/gitea` — patched in 1.26.2

## How to fix CVE-2026-58426

Fixed versions are recorded for 1 package: go:code.gitea.io/gitea 1.26.2. No vendor patch reference has been recorded for CVE-2026-58426 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-2026-58426

1 tracked threat in the Threadlinqs corpus references CVE-2026-58426, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Gitea CVE-2026-58443: Authorization Bypass in Pull Request Update API Enables Private Repo Access](https://intel.threadlinqs.com/threat/TL-2026-1587) — CRITICAL · 2026-07-21

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-10-11. 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-hg5r-vq93-9fv6)
- [github.com — patch](https://github.com/go-gitea/gitea/pull/37707)
- [github.com — release notes](https://github.com/go-gitea/gitea/releases/tag/v1.26.2)
- [blog.gitea.com — release notes](https://blog.gitea.com/release-of-1.26.2/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-58426
Full detection coverage and IOCs for threats exploiting CVE-2026-58426 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp