EUVD-2026-36770
GHSA-gqmg-cfhg-mw2q
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-reachable HTTP endpoint, single crafted request, no authentication or user interaction, code injection yields full confidentiality, integrity and availability impact within the web application's privileges.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
3DescriptionCVE.org
An issue in the loopback request handling component of fossar selfoss v2.20-SNAPSHOT allows attackers to execute arbitrary commands and obtain sensitive information via supplying a crafted HTTP request.
AnalysisAI
Remote code execution in fossar selfoss v2.20-SNAPSHOT allows unauthenticated attackers to execute arbitrary commands and retrieve sensitive data by sending a crafted HTTP request to the loopback request handling component. The flaw carries a CVSS 9.8 score and a public gist (likely containing proof-of-concept material) is referenced, though EPSS exploitation probability remains low at 0.19% and the issue is not listed in CISA KEV.
Technical ContextAI
selfoss is an open-source PHP-based RSS reader, multi-purpose live stream, mashup and aggregation web application maintained by the fossar organization. The vulnerability is classified as CWE-94 (Improper Control of Generation of Code, i.e. Code Injection) and resides in the loopback request handling component - the internal mechanism selfoss uses to dispatch HTTP requests to itself, typically used for spout (feed source) processing and background tasks. Improper sanitization or validation of attacker-controlled input that flows into a code-execution sink (such as eval, dynamic include, or command shell call) within this loopback path enables an attacker to coerce the server into executing arbitrary code in the application's context.
RemediationAI
No vendor-released patch identified at time of analysis - the EUVD and NVD references do not cite a fixed version or commit. Operators should monitor the fossar/selfoss GitHub repository for a security release that supersedes v2.20-SNAPSHOT and upgrade as soon as one is published. As compensating controls in the interim, restrict network exposure of the selfoss instance by placing it behind an authenticating reverse proxy (HTTP basic auth or SSO) so that anonymous requests cannot reach the loopback endpoint, and firewall the application port to trusted source IPs only; this preserves normal feed-reader use for known users but breaks any public-facing deployment. Consider running selfoss under a low-privilege OS user with no shell, and applying egress filtering from the host so that successful RCE cannot be used to fetch second-stage payloads or exfiltrate data; consult the gist at https://gist.github.com/pyuysig/272bf96c028ed45ad010b7c75937c914 and the NVD record at https://nvd.nist.gov/vuln/detail/CVE-2026-50872 for any later-added mitigation guidance.
LibreNMS before 24.10.0 allows a remote attacker to execute arbitrary code via OS command injection involving AboutContr
Reachable assertion in Open5GS up to version 2.7.6 allows remote unauthenticated attackers to crash the Diameter CER han
A Command Injection issue in the payload build page in BYOB (Build Your Own Botnet) 2.0 allows attackers to execute arbi
Denial of service in Open5GS 2.7.6 and earlier allows network-adjacent attackers with low-privilege Diameter Gx peer acc
Denial of service in Open5GS HSS (Home Subscriber Server) versions 2.7.0 through 2.7.6 is triggered remotely by manipula
Remote command injection in Control Web Panel allows unauthenticated attackers to execute arbitrary OS commands as root
LINQPad before 5.52.01 Pro edition is vulnerable to Unsafe Deserialization in LINQPad.AutoRefManager::PopulateFromCache(
Remote code execution in dash-uploader (Python package for Plotly Dash) versions 0.1.0 through 0.7.0a2 allows unauthenti
Command injection in LiteLLM 1.18.10 lets attackers who can configure MCP (Model Context Protocol) servers supply arbitr
SQL injection in AzuraCast's backup restore flow (versions up to and including 0.23.7) lets an attacker achieve privileg
Arbitrary file read in Yu AI Code Mother v4.3 lets anonymous, remote attackers retrieve files outside the intended previ
Remote code execution in APScheduler (all versions through 3.10.x and 4.0.0a5) is achievable when applications deseriali
Same weakness CWE-94 – Code Injection
View allShare
External POC / Exploit Code
Leaving vuln.today