CVE-2026-29042: Nuclio is a "Serverless" framework for Real-Time Events and Data Processing

Q: How do I fix CVE-2026-29042?

nuclio: upgrade to 1.15.20. Exact commands for each OS are on this page.

Q: Is CVE-2026-29042 being exploited?

CVE-2026-29042 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-2026-29042 affect?

CVE-2026-29042 affects nuclio. Severity is critical (CVSS 9.8). Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. Prior to version 1.15.20, the Nuclio Shell Runtime component contains a command injection vulnerability in how it processes user-supplied arguments. When a functio

Q: How urgent is CVE-2026-29042?

Priority 68/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-29042 is a critical-severity flaw (CVSS 9.8) affecting nuclio. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. Prior to version 1.15.20, the Nuclio Shell Runtime component contains a command injection vulnerability in how it processes user-supplied arguments. When a function is invoked via HTTP, the runtime reads the X-Nuclio-Arguments header and directly incorporates its value into shell commands without any validation or sanitization. This issue has been patched in version 1.15

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-75
Published	2026-03-06
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: iguazio

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-06 07:16 UTCPublished CVE record published
2026-06-17 10:29 UTCUpdated Record last modified

iguazio nuclio UPGRADE

Affected: < 1.15.20

Fixed in: 1.15.20

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nuclio || rpm -q nuclio || nuclio --version

2. UPGRADE to 1.15.20 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nuclio

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nuclio

Note

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

Exact fixes by distribution

Go · github.com/nuclio/nuclio · FIXED · 1.15.20 · vulnerable: <= 1.15.9 · source

go get github.com/nuclio/nuclio@v1.15.20 go list -m github.com/nuclio/nuclio

Fedora 46 · python-hatchling · FIXED · 1.33.0-1.fc46 · FEDORA-2026-3ccbf17812 · source

sudo dnf upgrade --advisory=FEDORA-2026-3ccbf17812

Fedora ELN · pie · FIXED · 1.5.3-1.eln159 · FEDORA-2026-e009523caa · source

sudo dnf upgrade --advisory=FEDORA-2026-e009523caa

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/nuclio/nuclio/security/advisories/GHSA-95fj-3w7g-4r27

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-2026-29042?

nuclio: upgrade to 1.15.20. Exact commands for each OS are on this page.

Is CVE-2026-29042 being exploited?

CVE-2026-29042 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-2026-29042 affect?

CVE-2026-29042 affects nuclio. Severity is critical (CVSS 9.8). Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. Prior to version 1.15.20, the Nuclio Shell Runtime component contains a command injection vulnerability in how it processes user-supplied arguments. When a functio

How urgent is CVE-2026-29042?

Priority 68/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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