CVE-2026-5474: A vulnerability was found in NASA cFS up to 7.0.0

Q: How do I fix CVE-2026-5474?

core flight system: upgrade to newer than 7.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-5474 being exploited?

CVE-2026-5474 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-2026-5474 affect?

CVE-2026-5474 affects core flight system. Severity is medium (CVSS 6.3). A vulnerability was found in NASA cFS up to 7.0.0. This affects the function CFE_MSG_GetSize of the file apps/to_lab/fsw/src/to_lab_passthru_encode.c of the component CCSDS Packet Header Handler. Performing a manipulation results in heap-ba

Q: How urgent is CVE-2026-5474?

Priority 30/100. No elevated risk signals yet.

Routine

MEDIUM 6.3UPGRADE

CVE-2026-5474 is a medium-severity flaw (CVSS 6.3) affecting core flight system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in NASA cFS up to 7.0.0. This affects the function CFE_MSG_GetSize of the file apps/to_lab/fsw/src/to_lab_passthru_encode.c of the component CCSDS Packet Header Handler. Performing a manipulation results in heap-based buffer overflow. The attacker must have access to the local network to execute the attack. The project was informed of the problem early through an issue report but has not responded yet.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-119, CWE-122
Published	2026-04-03
Last modified	2026-07-24

Publisher (CNA): VulDB · Vendor: nasa

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-03 17:16 UTCPublished CVE record published
2026-07-24 20:10 UTCUpdated Record last modified

nasa core flight system UPGRADE

Affected: <= 7.0.0

Fixed in: newer than 7.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy core-flight-system || rpm -q core-flight-system || core-flight-system --version

2. UPGRADE to newer than 7.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade core-flight-system

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade core-flight-system

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-2026-5474?

core flight system: upgrade to newer than 7.0.0. Exact commands for each OS are on this page.

Is CVE-2026-5474 being exploited?

CVE-2026-5474 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-2026-5474 affect?

CVE-2026-5474 affects core flight system. Severity is medium (CVSS 6.3). A vulnerability was found in NASA cFS up to 7.0.0. This affects the function CFE_MSG_GetSize of the file apps/to_lab/fsw/src/to_lab_passthru_encode.c of the component CCSDS Packet Header Handler. Performing a manipulation results in heap-ba

How urgent is CVE-2026-5474?

Priority 30/100. No elevated risk signals yet.

Related CVEs

CVE-2026-5473 MEDIUM 4.5 UPGRADE A vulnerability has been found in NASA cFS up to 7.0.0
CVE-2026-5475 MEDIUM 5.5 UPGRADE A vulnerability was determined in NASA cFS up to 7.0.0
CVE-2026-5476 MEDIUM 4.6 UPGRADE A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit

References

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