CVE-2026-121881
Posit Workbench code-server session-state RPC (get_last_seen) SQL injection
Description
SQL injection vulnerability in the get_last_seen code-server session-state RPC in Posit Software, PBC Posit Workbench before 2026.08.0 allows authenticated users to read arbitrary data from the Workbench database via the sessionIds parameter. NOTE: exploitation requires a valid authenticated session; no administrative privileges are needed. The vulnerability is limited to disclosure of database contents.
INFO
Published Date :
Nov. 6, 2026, 4:17 p.m.
Last Modified :
Nov. 6, 2026, 6:18 p.m.
Remotely Exploit :
Yes !
Source :
8c484e69-127d-402b-9cdb-5f86ef43eb86
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | MEDIUM | 8c484e69-127d-402b-9cdb-5f86ef43eb86 | ||||
| CVSS 4.0 | MEDIUM | 8c484e69-127d-402b-9cdb-5f86ef43eb86 |
Solution
- Update Posit Workbench to version 2026.08.0 or later.
- Apply vendor-supplied patches for the session-state RPC.
- Validate database access controls for session IDs.
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-2026-121881.
| URL | Resource |
|---|---|
| https://docs.posit.co/ide/news/#rstudio-2026.08.0 | |
| https://trust.posit.co/updates |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-121881 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-2026-121881
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-2026-121881 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-121881 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
Nov. 06, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-121881', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-11-06T17:20:53.037205Z'} -
New CVE Received by 8c484e69-127d-402b-9cdb-5f86ef43eb86
Nov. 06, 2026
Action Type Old Value New Value Added Description SQL injection vulnerability in the get_last_seen code-server session-state RPC in Posit Software, PBC Posit Workbench before 2026.08.0 allows authenticated users to read arbitrary data from the Workbench database via the sessionIds parameter. NOTE: exploitation requires a valid authenticated session; no administrative privileges are needed. The vulnerability is limited to disclosure of database contents. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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:Y/R:A/V:C/RE:M/U:Amber Added CWE CWE-89 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/121xxx/CVE-2026-121881.json">CVE-2026-121881</a> Added Reference https://docs.posit.co/ide/news/#rstudio-2026.08.0 Added Reference https://trust.posit.co/updates