CVE-2026-82556 - Vulnerability Details

- Forgejo Repository Migration is_migrate_allowed.go net.LookupIP server-side request forgery

Description

A vulnerability was found in Forgejo up to 15.0.4. This issue affects the function net.LookupIP of the file services/migrations/allowlist/is_migrate_allowed.go of the component Repository Migration Handler. Performing a manipulation results in server-side request forgery. The attack can be initiated remotely. The exploit has been made public and could be used. The patch is named b313bb83f5ff22bcc0378e0e0ca7bbd58303f168. It is recommended to apply a patch to fix this issue. The project maintainer explains: "I don't intend to backport this to v15 or v16 as it is a breaking change."

Published: 2026-08-30

Score: 5.3 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

A flaw in the Repository Migration Handler of Forgejo uses the standard net.LookupIP routine without proper validation, allowing an attacker to supply an arbitrary hostname or IP address. When the import endpoint processes the value, Forgejo resolves the address and may establish outbound connections to that target, enabling the execution of a server‑side request forgery. This can reveal internal DNS records, access internal services, or exfiltrate data through the outbound connection. Based on the description, it is inferred that the vulnerable API does not require authentication, allowing a remote actor to trigger the flaw from anywhere that can reach the migration endpoint.

Affected Systems

Forgejo installations with version 15.0.4 or earlier are affected because the SSRF logic remains unpatched in those releases. The vulnerability is confined to the migration component and will impact any instance that continues to run the old logic. The patch commit b313bb83f5ff22bcc0378e0e0ca7bbd58303f168 removes the unvalidated net.LookupIP call.

Risk and Exploitability

The CVSS score of 5.3 indicates moderate severity. The EPSS score is not available, leaving exploitation likelihood uncertain, but the vulnerability is publicly disclosed and a patch exists. The exploit can be performed remotely against the migration API, and based on the description it is inferred that no special privileges are needed to trigger it. The vulnerability is not listed in CISA KEV, yet its remote trigger and SSRF nature justify careful monitoring.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

Forgejo

affected

Version	Status	Constraints
`15.0.0`	affected	—
`15.0.1`	affected	—
`15.0.2`	affected	—
`15.0.3`	affected	—
`15.0.4`	affected	—

No data.

Vendor Product Confidence Versions

Forgejo

95%

Version	Status	Scheme	Platform
`15.0.0`	affected	semver	—
`15.0.1`	affected	semver	—
`15.0.2`	affected	semver	—
`15.0.3`	affected	semver	—
`15.0.4`	affected	semver	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Apply the vendor patch associated with commit b313bb83f5ff22bcc0378e0e0ca7bbd58303f168 to the Repository Migration Handler.
Upgrade Forgejo to a release newer than 15.0.4 where the SSRF bug is resolved.
If an upgrade is not feasible, disable the Repository Migration feature or restrict its use to trusted administrators only.
Monitor outbound DNS and HTTP traffic for unusual requests that could indicate exploitation of the SSRF endpoint.

Generated by OpenCVE AI on August 30, 2026 at 20:20 UTC.

Tracking

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Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00214.

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://codeberg.org/forgejo/forgejo/commit/b313bb83f5ff22bcc0378e0e0ca7bbd58303f168
https://codeberg.org/forgejo/forgejo/issues/13433
https://codeberg.org/forgejo/forgejo/pulls/13490
https://nvd.nist.gov/vuln/detail/CVE-2026-82556
https://vuldb.com/cve/CVE-2026-82556
https://vuldb.com/submit/891889
https://vuldb.com/vuln/397072
https://vuldb.com/vuln/397072/cti
https://www.cve.org/CVERecord?id=CVE-2026-82556

History

Tue, 01 Sep 2026 12:15:00 +0000

Type	Values Removed	Values Added
References		https://nvd.nist.gov/vuln/detail/CVE-2026-82556 https://www.cve.org/CVERecord?id=CVE-2026-82556
Metrics	threat_severity `None`	threat_severity `Moderate`

Mon, 31 Aug 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sun, 30 Aug 2026 18:00:00 +0000

Type	Values Removed	Values Added
Description		A vulnerability was found in Forgejo up to 15.0.4. This issue affects the function net.LookupIP of the file services/migrations/allowlist/is_migrate_allowed.go of the component Repository Migration Handler. Performing a manipulation results in server-side request forgery. The attack can be initiated remotely. The exploit has been made public and could be used. The patch is named b313bb83f5ff22bcc0378e0e0ca7bbd58303f168. It is recommended to apply a patch to fix this issue. The project maintainer explains: "I don't intend to backport this to v15 or v16 as it is a breaking change."
Title		Forgejo Repository Migration is_migrate_allowed.go net.LookupIP server-side request forgery
First Time appeared		Forgejo Forgejo forgejo
Weaknesses		CWE-918
CPEs		cpe:2.3:a:forgejo:forgejo::::::::
Vendors & Products		Forgejo Forgejo forgejo
References		https://codeberg.org/forgejo/forgejo/commit/b313bb83f5ff22bcc0378e0e0ca7bbd58303f168 https://codeberg.org/forgejo/forgejo/issues/13433 https://codeberg.org/forgejo/forgejo/pulls/13490 https://vuldb.com/cve/CVE-2026-82556 https://vuldb.com/submit/891889 https://vuldb.com/vuln/397072 https://vuldb.com/vuln/397072/cti
Metrics		cvssV2_0 `{'score': 6.5, 'vector': 'AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C'}` cvssV3_0 `{'score': 6.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}` cvssV3_1 `{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}` cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}`

Subscriptions

Forgejo Forgejo

MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-08-30T17:45:08.226Z

Updated: 2026-08-31T18:36:39.909Z

Reserved: 2026-08-29T19:03:24.577Z

Link: CVE-2026-82556

Vulnrichment

Updated: 2026-08-31T18:36:34.043Z

NVD

Status : Deferred

Published: 2026-08-30T18:17:00.563

Modified: 2026-08-31T20:56:08.800

Link: CVE-2026-82556

Redhat

Severity : Moderate

Publid Date: 2026-08-30T17:45:08Z

Links: CVE-2026-82556 - Bugzilla

OpenCVE Enrichment

Updated: 2026-08-30T20:30:03Z

Weaknesses

CWE-918
Server-Side Request Forgery (SSRF)

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

Exploitation poc

Automatable no

Technical Impact partial

Subscriptions

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