Gitea migration and pull mirror SSRF through multi-answer DNS

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-101029
StatePUBLISHED
AssignerGitea
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 20:17:08 UTC
Updated2026-10-15 02:29:40 UTC
DescriptionGitea's repository migration and pull mirror egress checks could be bypassed with a hostname that returns multiple DNS answers, because the address that was validated was not necessarily the address Git later connected to. A low-privileged user who can create migrations or mirrors could direct the server to internal services, reading from and writing to reachable internal Git or HTTP endpoints. Content from internal responses could additionally be disclosed through migration and mirror error messages.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.001240000 probability, percentile 0.018740000 (date 2026-10-07)

Problem Types: CWE-209 | CWE-367 | CWE-918 | CWE-209 CWE-209: Generation of Error Message Containing Sensitive Information | CWE-367 CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gitea Gitea All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gitea Gitea affected 1.27.3 semver Not specified

References

ReferenceSourceLinkTags
github.com/go-gitea/gitea/releases/tag/v28.0.0 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com Release Notes
github.com/go-gitea/gitea/pull/39010 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com Patch, Issue Tracking
github.com/go-gitea/gitea/pull/39426 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com Patch, Issue Tracking
blog.gitea.com/release-of-28.0.0 88ee5874-cf24-4952-aea0-31affedb7ff2 blog.gitea.com Release Notes
github.com/go-gitea/gitea/security/advisories/GHSA-6g2h-xpg3-rm48 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com Exploit, Mitigation, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: https://github.com/cipher-creator (en)

CNA: https://github.com/TheFox0x7 (en)

CNA: https://github.com/silverwind (en)

CNA: https://github.com/bircni (en)

CNA: https://github.com/wxiaoguang (en)

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