CVE-2026-1078Network attack vector

Arbitrary file write via malicious website

Published Apr 7, 2026 · Updated Apr 7, 2026

Arbitrary file write in Pega Browser Extension for Robotic Automation 22.1 and R25 allows remote attackers to write files via a website. Pega has not disclosed the extension component or validation failure that permits malicious website code to direct the arbitrary file write. Exploitation requires an active Chrome or Edge automation and a Robot Runtime user to navigate to the attacker's site; system integrity and availability can be affected.

CVSS severity7.2
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Arbitrary file write in Pega Browser Extension for Robotic Automation 22.1 and R25 allows remote attackers to write files via a website. Pega has not disclosed the extension component or validation failure that permits malicious website code to direct the arbitrary file write. Exploitation requires an active Chrome or Edge automation and a Robot Runtime user to navigate to the attacker's site; system integrity and availability can be affected.

The record

CVE
CVE-2026-1078
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
Pegasystems Inc.
Product
Pega Robot Studio
Classifications
CWE-284, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=22.1
  2. Affected versionversion=R25

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pegasystems Inc. · Pega Robot Studioversion=22.1; version=R25

Published CVSS scores

7.2Pegasystems Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:H/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1204.002User Execution: Malicious File

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo