CVE-2026-26011: navigation2 is a ROS 2 Navigation Framework and System

Q: How do I fix CVE-2026-26011?

nav2: upgrade to newer than 1.3.11. Exact commands for each OS are on this page.

Q: Is CVE-2026-26011 being exploited?

CVE-2026-26011 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-2026-26011 affect?

CVE-2026-26011 affects nav2. Severity is critical (CVSS 9.8). navigation2 is a ROS 2 Navigation Framework and System. In 1.3.11 and earlier, a critical heap out-of-bounds write vulnerability exists in Nav2 AMCL's particle filter clustering logic. By publishing a single crafted geometry_msgs/PoseWithCo

Q: How urgent is CVE-2026-26011?

Priority 59/100. 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-2026-26011 is a critical-severity flaw (CVSS 9.8) affecting nav2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

navigation2 is a ROS 2 Navigation Framework and System. In 1.3.11 and earlier, a critical heap out-of-bounds write vulnerability exists in Nav2 AMCL's particle filter clustering logic. By publishing a single crafted geometry_msgs/PoseWithCovarianceStamped message with extreme covariance values to the /initialpose topic, an unauthenticated attacker on the same ROS 2 DDS domain can trigger a negative index write (set->clusters[-1]) into heap memory

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	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-122, CWE-787
Published	2026-02-12
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2026-02-12 21:16 UTCPublished CVE record published
2026-06-17 10:25 UTCUpdated Record last modified

opennav nav2 UPGRADE

Affected: <= 1.3.11

Fixed in: newer than 1.3.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nav2 || rpm -q nav2 || nav2 --version

2. UPGRADE to newer than 1.3.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nav2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nav2

Note

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

Exact fixes by distribution

Fedora ELN · fwupd-efi · FIXED · 1.9-3.eln159 · FEDORA-2026-44fd42db42 · source

sudo dnf upgrade --advisory=FEDORA-2026-44fd42db42

Fedora 46 · crest · FIXED · 3.0.2-1.fc46 · FEDORA-2026-b49adefa8f · source

sudo dnf upgrade --advisory=FEDORA-2026-b49adefa8f

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/ros-navigation/navigation2/security/advisories/GHSA-mgj5-g2p6-gc5x

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-2026-26011?

nav2: upgrade to newer than 1.3.11. Exact commands for each OS are on this page.

Is CVE-2026-26011 being exploited?

CVE-2026-26011 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-2026-26011 affect?

CVE-2026-26011 affects nav2. Severity is critical (CVSS 9.8). navigation2 is a ROS 2 Navigation Framework and System. In 1.3.11 and earlier, a critical heap out-of-bounds write vulnerability exists in Nav2 AMCL's particle filter clustering logic. By publishing a single crafted geometry_msgs/PoseWithCo

How urgent is CVE-2026-26011?

Priority 59/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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