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Zr.Admin.NET information disclosure in workflow instance endpoint

Affects Zr.Admin.NET builds from commit 85cff6a through commit eb9228a, where logged-in users can read other users' workflow approval requests. No fixed version or patch is named.

CVE-2026-129454

Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.

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

7.1HighCNA
Exploited
No known exploitation
Fix
Fix or patch referenced
Who is exposed
Specific setups only

Do first: Check whether your setup matches what the bug needs. Zr.Admin.NET builds from commit 85cff6a through commit eb9228a

Published
Last modified
Reference
Last checked
15/100 · provisional
Specific setups only
None on Exploit-DB, Metasploit or GitHub

Summary

Zr.Admin.NET from izhaorui contains an insecure direct object reference flaw in its workflow instance endpoint that lets a logged-in, low-privilege user view other users' workflow instances, including submitted form contents, applicant details and approval records. An attacker can reach it remotely over the network by enumerating sequential instance IDs.

Original description

Zr.Admin.NET commit 85cff6a through commit eb9228a contains an insecure direct object reference vulnerability in GET /workflow/instance/{instanceId} that lets logged-in users view others' workflow instances. Authenticated low-privilege attackers can enumerate sequential instance IDs to read other users' approval requests, including submitted form contents, applicant details and approval records.

Who should check

Teams running izhaorui Zr.Admin.NET from commit 85cff6a through eb9228a that have logged-in user accounts and use workflow approvals.

“Affecting Zr.Admin.NET >= 85cff6ae22389c241d3a4efe178273966650f7ca, <= eb9228a23014f6000c06cab2f10ae0d44ecbbd3a”

vulncheck.com

cve.now Index

15Pcve.now Index 15 of 100 · methodology v3 · provisional
  • Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
  • Exposure8/25Specific setups only, reachable over the network
  • Reach?/20Unknown. No tracked technology or package matched
  • Severity7.1/10CVSS 7.1
  • No patch0/5No signal

What would change the score

  • Would score about 65 if added to CISA KEV
  • Would score about 60 if CISA's SSVC rates exploitation active
  • Would score about 22 if CISA's SSVC rates it automatable

How the score works · Rankings

What to do

  • Check whether your setup matches what the bug needs.

    Zr.Admin.NET builds from commit 85cff6a through commit eb9228a

  • Apply the patch listed under Evidence.

Check your systems with an agent

Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.

Check whether my systems are affected by CVE-2026-129454 (Zr.Admin.NET commit 85cff6a through eb9228a IDOR via Workflow Instance Endpoint), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-129454 (entry last updated 2026-11-15):
Affected:
- izhaorui Zr.Admin.NET: version range not reported
Fixed versions: none listed yet.
Conditions (all must be true for the bug to be hit):
- Zr.Admin.NET builds from commit 85cff6a through commit eb9228a (source: https://www.vulncheck.com/advisories/zr-admin-net-commit-85cff6a-through-eb9228a-idor-via-workflow-instance-endpoint)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, low-privilege login, no user action.
CISA KEV: CVE-2026-129454 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-129454 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/izhaorui/Zr.Admin.NET/commit/85cff6ae22389c241d3a4efe178273966650f7ca
- https://github.com/izhaorui/Zr.Admin.NET/issues/27
- https://vul.yulun.ac.cn/20261114/zr-admin-net/
- https://github.com/izhaorui/Zr.Admin.NET/blob/eb9228a23014f6000c06cab2f10ae0d44ecbbd3a/ZR.Workflow/Controllers/WfFlowInstanceController.cs#L49-L57
- https://github.com/izhaorui/Zr.Admin.NET/blob/eb9228a23014f6000c06cab2f10ae0d44ecbbd3a/ZR.Workflow/Service/WfFlowInstanceService.cs#L173-L176
- https://www.vulncheck.com/advisories/zr-admin-net-commit-85cff6a-through-eb9228a-idor-via-workflow-instance-endpoint
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-129454
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-129454"}.

Timeline

  1. CVE published
  2. First seen by cve.now

Affected versions

  • izhaorui Zr.Admin.NET

    Version range not reported

Evidence 8

CVE record · 2

Establishes: The identifier and description.

  1. Record
  2. Record

Other links · 6

  1. Patch
  2. Report
  3. Repository
  4. Repository
  5. Link
  6. Link

Corrections

None so far.

Something wrong on this page? Report an error. Every fix is listed here.

Questions about CVE-2026-129454

Is CVE-2026-129454 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data

What does this mean?

An insecure direct object reference lets a logged-in user read other users' workflow approval requests. The exposed data includes submitted form contents, applicant details and approval records.Source: vulncheck.com

Am I affected, and how do I check?

Builds of Zr.Admin.NET from commit 85cff6a through commit eb9228a are in the affected range. To check a deployment, compare the commit hash of the running build against that range.Source: vulncheck.com

How do I fix CVE-2026-129454?

The checked facts name no fixed version or patch ID, so no upgrade target can be given from them. Check the Zr.Admin.NET project for a later commit or release that addresses this issue.Source: vulncheck.com

Sources

More CVEs

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