---
title: "CVE-2026-25921: Gogs: Cross-repository LFS object overwrite via missing content hash verification"
url: https://erroneo.us/security/cve/CVE-2026-25921/
description: "CVE-2026-25921 (gogs.io/gogs (Go)): Gogs is an open source self-hosted Git service. Prior to version 0.14.2, overwritable LFS object across different repos…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-05
date_modified: 2026-03-06
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-25921"
kev: false
cvss: 9.3
epss: 0.00285
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-25921: Gogs: Cross-repository LFS object overwrite via missing content hash verification

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.3% , percentile 20: FIRST’s model estimates a 0.3% chance of exploitation activity in the next 30 days, higher than 20% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes gogs.io/gogs (Go) <= 0.14.1, fixed in 0.14.2 . Check your lockfile, including transitive dependencies.

## What it is

Gogs is an open source self-hosted Git service. Prior to version 0.14.2, overwritable LFS object across different repos leads to supply-chain attack, all LFS objects are vulnerable to be maliciously overwritten by malicious attackers. This issue has been patched in version 0.14.2.

## Affected packages

- Go `gogs.io/gogs` <= 0.14.1 → fixed: 0.14.2

## Affected products (CVE record)

- gogs gogs: < 0.14.2

## Severity

- GitHub_M CVSS 3.1: 9.3 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L`
- GitHub CVSS 3.1: 9.3 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.29% probability of exploitation activity in the next 30 days; percentile 20.

## Sources

- [GitHub Advisory GHSA-cj4v-437j-jq4c](https://github.com/advisories/GHSA-cj4v-437j-jq4c)
- [CVE.org record CVE-2026-25921](https://www.cve.org/CVERecord?id=CVE-2026-25921)
- [NVD entry CVE-2026-25921](https://nvd.nist.gov/vuln/detail/CVE-2026-25921)
- [github.com](https://github.com/gogs/gogs/security/advisories/GHSA-cj4v-437j-jq4c)
- [github.com](https://github.com/gogs/gogs/pull/8166)
- [github.com](https://github.com/gogs/gogs/commit/81ee8836445ac888d99da8b652be7d5cbc5c4d5c)
- [github.com](https://github.com/gogs/gogs/releases/tag/v0.14.2)

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Source page: https://erroneo.us/security/cve/CVE-2026-25921/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt