NVD / CVE Program· CNA GitHub_M

CVE-2026-27626: OliveTin vulnerable to OS Command Injection via `password` argument type and webhook JSON extraction bypasses shell safety checks

Noroxi assessment

Priority: Monitor (action score 39/100)

Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
Probability of exploitation in the next 30 days: 0.63% (FIRST EPSS); higher than 50.7% of all records.
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: github.com/OliveTin/OliveTin (Go) 0.0.0-20260222101908-4bbd2eab1532.

Low priority for now. Upgrade to github.com/OliveTin/OliveTin (Go) 0.0.0-20260222101908-4bbd2eab1532 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

OliveTin gives access to predefined shell commands from a web interface. In versions up to and including 3000.10.0, OliveTin's shell mode safety check (`checkShellArgumentSafety`) blocks several dangerous argument types but not `password`. A user supplying a `password`-typed argument can inject shell metacharacters that execute arbitrary OS commands. A second independent vector allows unauthenticated RCE via webhook-extracted JSON values that skip type safety checks entirely before reaching `sh -c`. When exploiting vector 1, any authenticated user (registration enabled by default, `authType: none` by default) can execute arbitrary OS commands on the OliveTin host with the permissions of the OliveTin process. When exploiting vector 2, an unauthenticated attacker can achieve the same if the instance receives webhooks from external sources, which is a primary OliveTin use case. When an attacker exploits both vectors, this results in unauthenticated RCE on any OliveTin instance using Shell mode with webhook-triggered actions. As of time of publication, a patched version is not available.

CriticalCVSS 9.9 · v3.1—Proof of concept Fix available

Published: Feb 24, 2026
Updated: Jun 17, 2026
EPSS: 0.6% · 50th percentile
CWE: CWE-78

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 39 / 40 · 9.9 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.6%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 10.0; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
Proof of concept exists, no weaponized module
A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
olivetin	olivetin	cpe:2.3:a:olivetin:olivetin

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

olivetin olivetinup to 3000.10.0 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

OliveTin OliveTin
- <= 3000.10.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Go	github.com/OliveTin/OliveTin	from 0	—
Go	github.com/OliveTin/OliveTin	before 0.0.0-20260222101908-4bbd2eab1532	0.0.0-20260222101908-4bbd2eab1532

Same product

olivetin: all records

Other highest-scoring records for the same primary product.

CVE-2026-30223OliveTin: JWT Audience Validation Bypass in Local Key and HMAC Modes
35Monitor
CVE-2026-31817OliveTin's unsafe parsing of UniqueTrackingId can be used to write files
34Monitor
CVE-2026-67437OliveTin: Unauthenticated DoS via OAuth2 State Memory Exhaustion (Unbounded Map Growth)
30Monitor

Published before and after this one in the same product

← EarlierCVE-2025-50946Aug 13, 2025 · OS Command Injection in Olivetin 2025.4.22 Custom Themes via the ParseRequestURI function in service/internal/executor/arguments.go.
26Monitor
Later →CVE-2026-28342Mar 5, 2026 · OliveTin: Unauthenticated Denial of Service via Memory Exhaustion in PasswordHash API Endpoint
30Monitor
Later →CVE-2026-28789Mar 5, 2026 · OliveTin: Unauthenticated DoS via concurrent map writes in OAuth2 state handling
30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Go:github.com/OliveTin/OliveTin	0.0.0-20260222101908-4bbd2eab1532	Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Proof-of-concept repository on GitHub ×4

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	stars:1	2026-06-30
Proof-of-concept repository on GitHub	stars:2	2026-07-10
Proof-of-concept repository on GitHub	stars:1	2026-09-23
Proof-of-concept repository on GitHub	stars:0	2026-10-11

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

PublishedFeb 24, 2026
First PoCJun 30, 2026+125 d
TodayNov 9, 2026+258 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-67438155 days apartOliveTin OS Command Injection via Custom regex: Argument Type Bypassing Shell Safety Check
26Monitor
CVE-2025-50946195 days apartOS Command Injection in Olivetin 2025.4.22 Custom Themes via the ParseRequestURI function in service/internal/executor/arguments.go.
26Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-3022310 days apartOliveTin: JWT Audience Validation Bypass in Local Key and HMAC Modes
35Monitor
CVE-2026-3022410 days apartOliveTin: Session Fixation - Logout Fails to Invalidate Server-Side Session
21Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Changed
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

nvd-secondary

Root cause

User input is inserted as text into a shell command. The shell may interpret special characters in the input as part of the command.

The bug in code

The whole CWE-78 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const host = req.body.host;
2exec("ping -c 1 " + host, onResult);

Fixed

1const host = req.body.host;
2if (!/^[a-z0-9.-]{1,253}$/i.test(host)) return res.sendStatus(400);
3execFile("ping", ["-c", "1", host], onResult);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

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Change log

Fix✗ → ✓Sep 28, 2026, 10:44 PM UTC

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