CVE-2026-56657
Gitea SSH Key Parser Denial of Service
Description
Gitea SSH Key Parser Denial of Service
INFO
Published Date :
Aug. 13, 2026, 5:17 p.m.
Last Modified :
Aug. 26, 2026, 4:53 p.m.
Remotely Exploit :
No
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 the latest version.
- Apply vendor security patches promptly.
- Review SSH key parsing configurations.
- Monitor system resource usage.
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-2026-56657.
| URL | Resource |
|---|---|
| https://blog.gitea.com/gitea-1.27.0-is-released/ | |
| https://github.com/go-gitea/gitea/releases/tag/v1.27.0 | |
| https://github.com/go-gitea/gitea/security/advisories/GHSA-4xjf-493q-98p3 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-56657 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-2026-56657
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-2026-56657 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-56657 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.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added SSVC {'id': 'CVE-2026-56657', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-13T18:48:47.165858Z'} -
New CVE Received by 88ee5874-cf24-4952-aea0-31affedb7ff2
Aug. 13, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Gitea', 'product': 'Gitea Open Source Git Server', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '1.26.4'}], 'defaultStatus': 'unaffected'}] Added Description Gitea SSH Key Parser Denial of Service Added CWE CWE-284 Added Reference https://blog.gitea.com/gitea-1.27.0-is-released/ Added Reference https://github.com/go-gitea/gitea/releases/tag/v1.27.0 Added Reference https://github.com/go-gitea/gitea/security/advisories/GHSA-4xjf-493q-98p3