# CVE-2026-117677: Gitea Helm chart upload decompression denial of service

Status: published. Published: 2026-11-01. Updated: 2026-11-06.

When parsing an uploaded Helm chart, Gitea decompressed the archive and read every tar entry while looking for `Chart.yaml` without limiting the decompressed size, and did so before the package size quota was checked; the quota only considers the compressed upload size. A user with package write access to an owner, for example their own account on an instance with open registration, could repeatedly upload small, highly compressed archives that make the server spend CPU time proportional to the decompressed size, degrading the availability of the Gitea instance. The issue does not allow code execution or data access.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Gitea) — https://github.com/go-gitea/gitea/pull/39942
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Gitea) — https://github.com/go-gitea/gitea/pull/40085
- fix: gitea.dev (go): GitHub reports patched versions 28.3.0. Check the advisory for the affected release branch. (source: GitHub GHSA-r6mh-qg79-rqj2) — https://github.com/go-gitea/gitea/security/advisories/GHSA-r6mh-qg79-rqj2

## Affected products and versions

- Gitea / Gitea (gitea.dev): ≥ 0; < 28.3.0 (affected, semver). Source: CNA: Gitea
-  / gitea.dev (gitea.dev): <= 28.2.0 (affected, GitHub advisory range). Source: GitHub GHSA-r6mh-qg79-rqj2

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.21% as of 2026-11-06; percentile 11.27%

- SSVC: exploitation none; automatable yes; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-400, CWE-409

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/go-gitea/gitea/security/advisories/GHSA-r6mh-qg79-rqj2 (CNA: Gitea; vendor-advisory)

- https://github.com/go-gitea/gitea/pull/39942 (CNA: Gitea; patch)

- https://github.com/go-gitea/gitea/pull/40085 (CNA: Gitea; patch)

- https://blog.gitea.com/release-of-28.3.0/ (CNA: Gitea; release-notes)

- https://github.com/go-gitea/gitea/releases/tag/v28.3.0 (CNA: Gitea; release-notes)

- https://blog.gitea.com/release-of-28.3.0/ (88ee5874-cf24-4952-aea0-31affedb7ff2)

- https://github.com/go-gitea/gitea/pull/39942 (88ee5874-cf24-4952-aea0-31affedb7ff2)

- https://github.com/go-gitea/gitea/pull/40085 (88ee5874-cf24-4952-aea0-31affedb7ff2)

- https://github.com/go-gitea/gitea/releases/tag/v28.3.0 (88ee5874-cf24-4952-aea0-31affedb7ff2)

- https://github.com/go-gitea/gitea/security/advisories/GHSA-r6mh-qg79-rqj2 (88ee5874-cf24-4952-aea0-31affedb7ff2)

- https://github.com/go-gitea/gitea/security/advisories/GHSA-r6mh-qg79-rqj2 (GitHub Security Advisories; advisory)

## Provenance

- CNA: Gitea: https://www.cve.org/CVERecord?id=CVE-2026-117677; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-117677; retrieved 2026-11-02; source updated 2026-11-01

- GitHub Security Advisories: https://github.com/go-gitea/gitea/security/advisories/GHSA-r6mh-qg79-rqj2; retrieved 2026-11-06; source updated 2026-11-01

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-117677; retrieved 2026-11-06; source updated Not reported

Revision: 35013941f813aa707ad530ab136da1b04a2b949cf672469089bee163cce956ad

Canonical: https://y2.dev/cve/CVE-2026-117677

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