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CVE-2026-104633: When migrating a repository from another Gitea instance, Gitea used the page size reported in the source serve

31
Routine
MEDIUM 6.5UPGRADE

CVE-2026-104633 is a medium-severity flaw (CVSS 6.5) affecting gitea. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When migrating a repository from another Gitea instance, Gitea used the page size reported in the source server's API settings to end its paginated downloads. A source that reported `max_response_items` as `0` made these loops run indefinitely and grow server memory until it was exhausted. Any user who can migrate repositories could point a migration at a server they control and cause a denial of service.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score6.5 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.4% (top 66%)
CISA exploited listNo
WeaknessCWE-400, CWE-835
Published2026-10-06
Last modified2026-10-13
Publisher (CNA): Gitea Limited · Vendor: gitea

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Last updated 2026-10-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

gitea gitea UPGRADE
Affected: < 28.1.0
Fixed in: 28.1.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy gitea || rpm -q gitea || gitea --version
2. UPGRADE to 28.1.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade gitea
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade gitea
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
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-2026-104633?

gitea: upgrade to 28.1.0. Exact commands for each OS are on this page.

Is CVE-2026-104633 being exploited?

CVE-2026-104633 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-2026-104633 affect?

CVE-2026-104633 affects gitea. Severity is medium (CVSS 6.5). When migrating a repository from another Gitea instance, Gitea used the page size reported in the source server's API settings to end its paginated downloads. A source that reported `max_response_items` as `0` made these loops run indefinit

How urgent is CVE-2026-104633?

Priority 31/100. No elevated risk signals yet.

Software pages

Gitea vulnerabilities

Related CVEs

References

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