CVE-2026-120991
Gitea deletion of shared container blobs on rejected uploads
Description
When a container blob upload was rejected, for example because it exceeded a package size quota, the cleanup removed the blob from storage even if the same content already existed and was used by other packages. On an instance with a package quota configured, a user who can upload container images and has the exact content of another owner's package file or image layer could make it undownloadable. The cleanup now only removes blobs that the failed upload created.
INFO
Published Date :
Nov. 15, 2026, 10:17 p.m.
Last Modified :
Nov. 15, 2026, 10:17 p.m.
Remotely Exploit :
No
Source :
88ee5874-cf24-4952-aea0-31affedb7ff2
Solution
- Apply the latest security updates and patches.
- Review and configure package size quotas carefully.
- Ensure blob cleanup logic is robust and safe.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-120991.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-120991 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-120991
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-120991 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-120991 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 88ee5874-cf24-4952-aea0-31affedb7ff2
Nov. 15, 2026
Action Type Old Value New Value Added Description When a container blob upload was rejected, for example because it exceeded a package size quota, the cleanup removed the blob from storage even if the same content already existed and was used by other packages. On an instance with a package quota configured, a user who can upload container images and has the exact content of another owner's package file or image layer could make it undownloadable. The cleanup now only removes blobs that the failed upload created. Added CWE CWE-460 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/120xxx/CVE-2026-120991.json">CVE-2026-120991</a> Added Reference https://blog.gitea.com/release-of-28.4.0/ Added Reference https://github.com/go-gitea/gitea/pull/40120 Added Reference https://github.com/go-gitea/gitea/pull/40268 Added Reference https://github.com/go-gitea/gitea/releases/tag/v28.4.0 Added Reference https://github.com/go-gitea/gitea/security/advisories/GHSA-q8pg-ggp9-rm9m