Repository migration SSRF via multi-answer DNS allow-list bypass
- Published
- Aug 13, 2026
- Updated
- Aug 26, 2026
- EPSS
- 0.4% · 35th percentile
- CWE
- CWE-200
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Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Gitea). Independent of NVD's CPE analysis and usually ahead of it.
Gitea Gitea Open Source Git Server
- up to and including 1.26.4affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Go | code.gitea.io/gitea | before 1.27.0 | 1.27.0 |
| Go | gitea.dev | before 1.27.0 | 1.27.0 |
Same product
gitea: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-6886Inproper Sanitation of field leading to stored XSS50Plan
- CVE-2026-20896Gitea Docker image trusts spoofable reverse-proxy headers by default40Plan
- CVE-2026-56654Privilege Escalation via Access Token Scope Escalation in API39Monitor
- CVE-2026-58422Improper authorization on OAuth sign-in callback silently re-enables administrator-disabled accounts39Monitor
- CVE-2026-27780Gitea pre-receive hook can miss branch-protection checks after scanner errors39Monitor
- CVE-2026-26292Gitea LFS mirror synchronization bypasses migration HTTP transport restrictions39Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Go:code.gitea.io/gitea | 1.27.0 | Package registry (OSV) |
| Go:gitea.dev | 1.27.0 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- Tomer-PLreporter
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-559820 days apartOIDC userinfo Endpoint Returns Identity Claims Without Enforcing API Token Scopes36Monitor
- CVE-2026-584270 days apartPrivate org member list leaked via /members API endpoint — incomplete fix for PR #3814530Monitor
- CVE-2026-584340 days apartPrivate Repository Metadata Remains Accessible After Access Revocation30Monitor
- CVE-2026-2503841 days apartGitea private organization labels are visible to unauthorized users30Monitor
- CVE-2026-2445141 days apartGitea fork synchronization can expose private parent repository data30Monitor
- CVE-2026-5841941 days apartNotification API leaks private issue metadata after access revocation30Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
- CVE-2026-2623241 days apartGitea OAuth2 authorization codes lack expiry and reuse enforcement36Monitor
- CVE-2026-2869941 days apartGitea Basic Auth bypasses OAuth2 access token scopes32Monitor
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-200 · Exposure of Sensitive Information to an Unauthorized ActorCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
nvd-secondary
Root cause
The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.
The bug in code
The whole CWE-200 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
{ "permissions": ["tabs", "<all_urls>"], "background": { "service_worker": "analytics.js" }}Fixed
{ "permissions": ["activeTab"], "host_permissions": ["https://yildiz.example/*"]}Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- ExcavationCAPEC-116likelihood: High · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
- FootprintingCAPEC-169likelihood: High · Very Low
- Exploiting Trust in ClientCAPEC-22likelihood: High · High
- FingerprintingCAPEC-224likelihood: High · Very Low
- ICMP Echo Request PingCAPEC-285likelihood: Medium · Low
- TCP SYN ScanCAPEC-287Low
- Enumerate Mail Exchange (MX) RecordsCAPEC-290Low
ATT&CK techniques
- System Service DiscoveryT1007
- System Network Configuration DiscoveryT1016
- Remote System DiscoveryT1018
- System Owner/User DiscoveryT1033
- Masquerading: Match Legitimate Name or LocationT1036.005
- Network Service ScanningT1046
- System Network Connections DiscoveryT1049
- Process DiscoveryT1057
- Permission Groups DiscoveryT1069
- System Information DiscoveryT1082
- File and Directory DiscoveryT1083
- Account DiscoveryT1087
- Multi-Factor Authentication InterceptionT1111
- Peripheral Device DiscoveryT1120
- System Time DiscoveryT1124
- Access Token Manipulation:Token Impersonation/TheftT1134.001
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- blog.gitea.com/gitea-1.27.0-is-released/
- github.com/go-gitea/gitea/releases/tag/v1.27.0
- github.com/go-gitea/gitea/security/advisories/GHSA-h2x6-g7q6-344v
Vendor advisories and official records. Exploit/PoC links are deliberately left out.