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CVE-2026-5476 NASA CVE debrief

A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit systems. The affected function is CFE_TBL_ValidateCodecLoadSize in the file cfe/modules/tbl/fsw/src/cfe_tbl_passthru_codec.c. The manipulation leads to an integer overflow. The complexity of an attack is rather high and the exploitability is difficult. A fix is planned for the upcoming version milestone of the project. Organizations should review system configurations and prepare for the patch.

Vendor
NASA
Product
cFS
CVSS
LOW 2.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-03
Original CVE updated
2026-07-24
Advisory published
2026-04-03
Advisory updated
2026-07-24

Who should care

Organizations using NASA's Core Flight System (cFS) version 7.0.0 or earlier on 32-bit systems should be aware of this vulnerability and prepare for an upcoming patch. They should review system configurations, identify affected systems, and prioritize them for remediation.

Technical summary

The vulnerability CVE-2026-5476 is an integer overflow in the CFE_TBL_ValidateCodecLoadSize function of NASA's cFS up to version 7.0.0 on 32-bit systems. The vulnerability has a CVSS score of 2.1 and is considered to have low severity. The attack complexity is high and the exploitability is difficult. A fix is planned for the upcoming version milestone of the project. Organizations should review system configurations, identify affected systems, and prioritize them for remediation. The source details are limited, and verification tasks are needed to confirm affected scope and severity. Defenders should verify system configurations and review official advisories for further information.

Defensive priority

Apply the upcoming patch as soon as it is available. Review system configurations and ensure that affected systems are identified and prioritized for remediation.

Recommended defensive actions

  • Inventory affected systems for cFS version 7.0.0 or earlier on 32-bit architectures.
  • Monitor for public release of the patch and apply it as soon as possible.
  • Consider compensating controls such as additional monitoring or access restrictions until the patch is applied.
  • Review official advisories or CVE records to validate affected scope, severity, and vendor guidance.
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record was published on 2026-04-03T18:16:26.687Z and was last modified on 2026-07-24T09:10:00.153Z. The NVD entry is currently Analyzed. The source details are limited, and verification tasks are needed to confirm affected scope and severity. Defenders should verify system configurations and review official advisories for further information.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-03T18:16:26.687Z and has not been modified since then. The NVD entry is currently Analyzed.