PatchSiren cyber security CVE debrief
CVE-2026-59101 EstrellaXD CVE debrief
CVE-2026-59101 is a server-side request forgery (SSRF) vulnerability in AutoBangumi before 3.2.8. Unauthenticated remote attackers can exploit this to probe and potentially access internal network services. The vulnerability is located in the unprotected setup endpoint, specifically the POST /api/v1/setup/test-downloader endpoint, which can be exploited during the initial setup window. By supplying arbitrary host values, attackers can cause the server to issue HTTP GET requests to internal or reserved addresses, potentially leaking information through echoed connection-error messages.
- Vendor
- EstrellaXD
- Product
- Auto_Bangumi
- CVSS
- MEDIUM 6.9
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-02
- Original CVE updated
- 2026-07-07
- Advisory published
- 2026-07-02
- Advisory updated
- 2026-07-07
Who should care
Security teams and administrators responsible for AutoBangumi deployments should be aware of this vulnerability. Given the medium CVSS score of 6.9, this issue may not be critical for all environments but still poses a risk, especially in scenarios where internal network probing could lead to further exploitation or information disclosure.
Technical summary
The CVE-2026-59101 vulnerability in AutoBangumi before version 3.2.8 allows unauthenticated attackers to perform server-side request forgery (SSRF) attacks. This is possible through the unprotected POST /api/v1/setup/test-downloader endpoint used during initial setup. By providing arbitrary host values, attackers can cause the server to make HTTP GET requests to internal or reserved addresses. The vulnerability's CVSS score is 6.9, classified as Medium severity. Successful exploitation could lead to information leakage about internal network services through error messages.
Defensive priority
Medium priority should be given to patching this vulnerability, especially in environments where AutoBangumi is exposed to untrusted networks or users. The risk of internal network probing and potential subsequent attacks warrants prompt attention.
Recommended defensive actions
- Apply the patch: Upgrade AutoBangumi to version 3.2.8 or later to fix the SSRF vulnerability.
- Limit exposure: Restrict access to the setup endpoint, if possible, until the patch is applied.
- Monitor for suspicious activity: Keep an eye on logs for unusual requests to internal services, which could indicate attempted exploitation.
- Inventory and verify: Ensure all AutoBangumi instances are identified and verified to be running a patched version.
- Perform vulnerability scanning: Conduct regular scans to detect any AutoBangumi instances that may still be vulnerable.
- Implement network segmentation: Isolate critical internal services to limit the potential impact of a successful SSRF attack.
- Review and update incident response plans: Ensure that response plans include procedures for handling potential SSRF attacks and data leaks.
Evidence notes
The CVE record was published on 2026-07-02T20:17:08.507Z and was last modified on 2026-07-07T18:16:40.140Z. The NVD entry is currently Deferred. Multiple sources, including Vulncheck and GitHub, provide details about the vulnerability and the fix in version 3.2.8.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-02T20:17:08.507Z and has not been modified since then. The NVD entry is currently Deferred.