CVE-2026-111687

WeRSS (we-mp-rss) through 1.5.3 contains a remote code execution vulnerability that allows unauthenticated attackers to run code via the template parameter of the public GET /rss/{feed_id} endpoint. Attackers can supply a non-built-in ext value and a {{=expression}} template whose object-subclass traversal bypasses the eval denylist to run OS commands as the service account.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/rachelos/we-mp-rss/blob/v1.5.3/apis/rss.py#L185-L198
https://github.com/rachelos/we-mp-rss/blob/v1.5.3/core/lax/template_parser.py#L1150-L1166
https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce
https://www.vulncheck.com/advisories/werss-we-mp-rss-through-1.5.3-rce-via-template-parameter-in-rss-endpoint
https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce

Configurations

No configuration.

History

16 Oct 2026, 20:17

Type	Values Removed	Values Added
References	~~() https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce -~~	() https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce -

16 Oct 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 18:17

Updated : 2026-10-16 20:17

NVD link : CVE-2026-111687

Mitre link : CVE-2026-111687

CVE.ORG link : CVE-2026-111687

JSON object : View

Products Affected

No product.

CWE

CWE-95

Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

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