CVE-2026-21762Network attack vector

Browser protection reduction via missing HTTP headers

Published Jul 17, 2026 · Updated Jul 17, 2026

Improper HTTP header handling in HCLSoftware DevOps Loop 2.0.0 allows remote attackers to reduce browser-side protections. HCLSoftware has not identified which HTTP responses or security headers are affected, or whether the headers are omitted or malformed. No authentication or user interaction is required; the documented consequence is limited to weaker defenses against clickjacking, MIME sniffing, and cross-site scripting.

CVSS severity3.7
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper HTTP header handling in HCLSoftware DevOps Loop 2.0.0 allows remote attackers to reduce browser-side protections. HCLSoftware has not identified which HTTP responses or security headers are affected, or whether the headers are omitted or malformed. No authentication or user interaction is required; the documented consequence is limited to weaker defenses against clickjacking, MIME sniffing, and cross-site scripting.

The record

CVE
CVE-2026-21762
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
HCLSoftware
Product
DevOps Loop
Classifications
CWE-644
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 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=2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCLSoftware · DevOps Loopversion=2.0.0

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.7HCL SoftwareCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

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-644Improper Neutralization of HTTP Headers for Scripting Syntax

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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