Posit Workbench code-server session-state RPC (get_last_seen) SQL injection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-121881
StatePUBLISHED
AssignerPOSIT
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-06 16:17:53 UTC
Updated2026-11-06 18:18:01 UTC
DescriptionSQL 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.

Risk And Classification

Primary CVSS: v4.0 5.7 MEDIUM from 8c484e69-127d-402b-9cdb-5f86ef43eb86

CVSS:4.0/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

Problem Types: CWE-89 | CWE-89 CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

VersionSourceTypeScoreSeverityVector
4.08c484e69-127d-402b-9cdb-5f86ef43eb86Secondary5.7MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/C...
4.0CNACVSS5.7MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/A...

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Posit Software PBC Posit Workbench affected 2026.08.0 custom Linux

References

ReferenceSourceLinkTags
docs.posit.co/ide/news 8c484e69-127d-402b-9cdb-5f86ef43eb86 docs.posit.co
trust.posit.co/updates 8c484e69-127d-402b-9cdb-5f86ef43eb86 trust.posit.co
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to Posit Workbench 2026.08.0 or later. The patched release binds the caller-supplied session identifiers as query parameters instead of concatenating them into the SQL statement.

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