CVE-2026-80348Public exploitNetwork attack vector

Cross-application deployment and package control via missing authorization

Published Aug 26, 2026 · Updated Aug 26, 2026

Missing authorization in TarsWeb 3.0.16 and earlier allows remote authenticated users to control packages across applications. Four PatchController handlers omit AuthService role checks; download and delete also resolve an unscoped sequential package ID. Any valid account, even one scoped to an unrelated application, can deploy attacker-controlled packages to managed servers, retrieve or delete packages, or change deployment defaults.

CVSS severity8.8
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in TarsWeb 3.0.16 and earlier allows remote authenticated users to control packages across applications. Four PatchController handlers omit AuthService role checks; download and delete also resolve an unscoped sequential package ID. Any valid account, even one scoped to an unrelated application, can deploy attacker-controlled packages to managed servers, retrieve or delete packages, or change deployment defaults.

The record

CVE
CVE-2026-80348
Published
Aug 26, 2026
Updated
Aug 26, 2026
Vendor
TarsCloud
Product
TarsWeb
Classifications
CWE-862, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.0.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TarsCloud · TarsWebversion=0 <=3.0.16

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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