CVE-2026-45325Network attack vector

Prototype pollution via unchecked object paths

Published Jul 16, 2026 · Updated Jul 16, 2026

Prototype pollution in TML GO before 20260509.0340.15 allows remote attackers to modify inherited JavaScript properties through crafted paths. The @tmlmobilidade/utils setValueAtPath() function splits an untrusted path and assigns its value without rejecting proto, constructor, or prototype segments. Exploitation requires attacker-controlled paths to reach the utility; no GO endpoint or downstream gadget is published, so further application impact is unspecified.

CVSS severity8.2
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in TML GO before 20260509.0340.15 allows remote attackers to modify inherited JavaScript properties through crafted paths. The @tmlmobilidade/utils setValueAtPath() function splits an untrusted path and assigns its value without rejecting proto, constructor, or prototype segments. Exploitation requires attacker-controlled paths to reach the utility; no GO endpoint or downstream gadget is published, so further application impact is unspecified.

The record

CVE
CVE-2026-45325
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Transportes Metropolitanos de Lisboa
Product
GO
Classifications
CWE-1321, CAPEC-1, CAPEC-77, CAPEC-180, T1565
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 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=< 20260509.0340.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Transportes Metropolitanos de Lisboa · GOversion=< 20260509.0340.15

Published CVSS scores

8.2GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs
CAPEC-77Manipulating User-Controlled Variables
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1565Data Manipulation

Public exploit references

No public exploit references are available in this record.

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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