CVE-2026-27771: Gitea versions up to and including 1.26.1 have insufficient permission checks for Composer package source link

Q: How do I fix CVE-2026-27771?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Q: Is CVE-2026-27771 being exploited?

CVE-2026-27771 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-27771 affect?

CVE-2026-27771 affects affected software. Severity is high (CVSS 8.2). Gitea versions up to and including 1.26.1 have insufficient permission checks for Composer package source links, which can expose private or internal package source information.

Q: How urgent is CVE-2026-27771?

Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.2REMOTE

CVE-2026-27771 is a high-severity flaw (CVSS 8.2) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Gitea versions up to and including 1.26.1 have insufficient permission checks for Composer package source links, which can expose private or internal package source information.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-07-03
Last modified	2026-10-25

Publisher (CNA): Gitea Limited

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-07-03 21:16 UTCPublished CVE record published
2026-10-25 15:10 UTCUpdated Record last modified

Exact fixes by distribution

Go · code.gitea.io/gitea · FIXED · 1.26.2 · vulnerable: <= 1.26.1 · source

go get code.gitea.io/gitea@v1.26.2 go list -m code.gitea.io/gitea

Fedora ELN · nginx-mod-headers-more · FIXED · 0.41-1.eln159 · FEDORA-2026-31f55f396a · source

sudo dnf upgrade --advisory=FEDORA-2026-31f55f396a

Fedora 46 · erlang-hex_core · FIXED · 0.21.1-1.fc46 · FEDORA-2026-f3389199ff · source

sudo dnf upgrade --advisory=FEDORA-2026-f3389199ff

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: portbuster1337/CVE-2026-27771 (19 stars)
GitHub PoC: HORKimhab/CVE-2026-27771 (0 stars)
Nuclei scan template: Gitea Container Registry - Unauthorized Private Image Access

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-27771?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-27771 being exploited?

CVE-2026-27771 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-27771 affect?

CVE-2026-27771 affects affected software. Severity is high (CVSS 8.2). Gitea versions up to and including 1.26.1 have insufficient permission checks for Composer package source links, which can expose private or internal package source information.

How urgent is CVE-2026-27771?

Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Gitea vulnerabilities

References

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