CVE-2026-56771
NewsBlur < 14.5.0 - Server-Side Request Forgery via add_url Endpoint
Description
NewsBlur before version 14.5.0 contains a server-side request forgery vulnerability in the add_url endpoint that allows authenticated users to make arbitrary server requests to internal networks by failing to filter private IP addresses. Attackers can exploit this to access localhost services and cloud metadata endpoints, enabling internal network scanning and sensitive data exfiltration.
INFO
Published Date :
June 25, 2026, 7:16 p.m.
Last Modified :
July 14, 2026, 10:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-56771
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update NewsBlur to version 14.5.0.
- Filter private IP addresses in the add_url endpoint.
- Validate all user-supplied URLs.
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-2026-56771.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-56771 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-2026-56771
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-2026-56771 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-56771 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 [email protected]
Jul. 14, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://github.com/samuelclay/NewsBlur', 'vendor': 'samuelclay', 'product': 'NewsBlur', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '14.5.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] [{'repo': 'https://github.com/samuelclay/NewsBlur', 'vendor': 'samuelclay', 'product': 'NewsBlur', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '14.5.0', 'versionType': 'semver'}], 'packageURL': 'pkg:github/samuelclay/NewsBlur', 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 26, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-56771', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-26T02:16:13.660355Z'} -
New CVE Received by [email protected]
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/samuelclay/NewsBlur', 'vendor': 'samuelclay', 'product': 'NewsBlur', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '14.5.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description NewsBlur before version 14.5.0 contains a server-side request forgery vulnerability in the add_url endpoint that allows authenticated users to make arbitrary server requests to internal networks by failing to filter private IP addresses. Attackers can exploit this to access localhost services and cloud metadata endpoints, enabling internal network scanning and sensitive data exfiltration. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N Added CWE CWE-918 Added Reference https://github.com/samuelclay/NewsBlur/commit/2e6c6812c94f35a731bda864de5aef39f18307f1 Added Reference https://github.com/samuelclay/NewsBlur/commit/af742daeca7cc6c8b0d58cbea381e7bc44daa520 Added Reference https://github.com/samuelclay/NewsBlur/releases/tag/Android_14.5.0 Added Reference https://www.vulncheck.com/advisories/newsblur-server-side-request-forgery-via-add-url-endpoint