Server-Side Request Forgery Vulnerability in Forgejo Repository Migration Handler
CVE-2026-82556

5.3MEDIUM

Key Information:

Vendor

Forgejo

Status
Forgejo
Vendor
CVE Published:
30 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82556?

A vulnerability exists in the Repository Migration Handler of Forgejo, specifically in the function net.LookupIP located in the file services/migrations/allowlist/is_migrate_allowed.go. This issue can be exploited remotely, allowing attackers to perform server-side request forgery. The public disclosure of this exploit heightens the urgency for organizations to apply the patch identified as b313bb83f5ff22bcc0378e0e0ca7bbd58303f168 to mitigate potential risks. It is crucial to note that the maintainer has indicated that this fix will not be backported to versions 15 or 16, categorizing it as a breaking change.

Affected Version(s)

Forgejo 15.0.0

Forgejo 15.0.1

Forgejo 15.0.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-82556 - Proof of Concept

References

https://vuldb.com/vuln/397072
vdb-entrytechnical-description
https://vuldb.com/vuln/397072/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82556
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

spooky (VulDB User)
VulDB CNA Team
.