CVE-2026-35149: HCL DFXServer is affected by an Authentication Bypass vulnerability via server response manipulation

Q: How do I fix CVE-2026-35149?

dfx server: upgrade to newer than 2.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-35149 being exploited?

CVE-2026-35149 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-35149 affect?

CVE-2026-35149 affects dfx server. Severity is high (CVSS 8.2). HCL DFXServer is affected by an Authentication Bypass vulnerability via server response manipulation. An unauthorized user without valid credentials can exploit this flaw by intercepting and altering the server's authentication responses, a

Q: How urgent is CVE-2026-35149?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 8.2REMOTEUPGRADE

CVE-2026-35149 is a high-severity flaw (CVSS 8.2) affecting dfx server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

HCL DFXServer is affected by an Authentication Bypass vulnerability via server response manipulation. An unauthorized user without valid credentials can exploit this flaw by intercepting and altering the server's authentication responses, allowing them to gain unauthorized access to the application without verification.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-294
Published	2026-07-16
Last modified	2026-10-24

Publisher (CNA): HCL Software · Vendor: hcltech

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-16 12:17 UTCPublished CVE record published
2026-10-24 21:10 UTCUpdated Record last modified

hcltech dfx server UPGRADE

Affected: <= 2.5

Fixed in: newer than 2.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dfx-server || rpm -q dfx-server || dfx-server --version

2. UPGRADE to newer than 2.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dfx-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dfx-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-35149?

dfx server: upgrade to newer than 2.5. Exact commands for each OS are on this page.

Is CVE-2026-35149 being exploited?

CVE-2026-35149 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-35149 affect?

CVE-2026-35149 affects dfx server. Severity is high (CVSS 8.2). HCL DFXServer is affected by an Authentication Bypass vulnerability via server response manipulation. An unauthorized user without valid credentials can exploit this flaw by intercepting and altering the server's authentication responses, a

How urgent is CVE-2026-35149?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-35147 HIGH 8.2 UPGRADE HCL DFXServer is affected by a Broken Authentication vulnerability via direct API access
CVE-2026-35148 MEDIUM 6.3 UPGRADE HCL DFXServer is affected by a Missing Access Control vulnerability
CVE-2026-35146 MEDIUM 6.3 UPGRADE HCL DFXServer is affected by an Unencrypted Communication vulnerability

References

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