CVE-2026-73273
Gitea Maven checksum upload quota bypass and memory exhaustion
Description
Gitea's Maven upload handler reads checksum uploads entirely into memory and returns before enforcing package-size quotas. An authenticated user with package-publish permission can submit an oversized body to a checksum endpoint despite legitimate checksum values being at most 128 bytes. This bypasses the upload quota on that path and can exhaust server memory.
INFO
Published Date :
Oct. 14, 2026, 3:17 p.m.
Last Modified :
Oct. 14, 2026, 4:17 p.m.
Remotely Exploit :
Yes !
Source :
88ee5874-cf24-4952-aea0-31affedb7ff2
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Gitea to enforce package size limits.
- Validate artifact size before full memory consumption.
- Apply relevant security patches promptly.
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-2026-73273.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-73273 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-2026-73273
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-2026-73273 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-73273 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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CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Added SSVC {'id': 'CVE-2026-73273', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-10-14T14:43:29.972852Z'} -
New CVE Received by 88ee5874-cf24-4952-aea0-31affedb7ff2
Oct. 14, 2026
Action Type Old Value New Value Added Description Gitea's Maven upload handler reads checksum uploads entirely into memory and returns before enforcing package-size quotas. An authenticated user with package-publish permission can submit an oversized body to a checksum endpoint despite legitimate checksum values being at most 128 bytes. This bypasses the upload quota on that path and can exhaust server memory. Added CWE CWE-770 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/73xxx/CVE-2026-73273.json">CVE-2026-73273</a> Added Reference https://blog.gitea.com/release-of-1.27.3/ Added Reference https://github.com/go-gitea/gitea/pull/39028 Added Reference https://github.com/go-gitea/gitea/pull/39031 Added Reference https://github.com/go-gitea/gitea/releases/tag/v1.27.3 Added Reference https://github.com/go-gitea/gitea/security/advisories/GHSA-5xcq-p92v-43rf