CVE-2026-5476

MEDIUMNVD 4.64.6—
EchelonGraph scoreMEDIUM confidence

Score 4.6 from GitHub Security Advisory (severity: LOW) published 2026-04-03. NVD baseline CVSS 4.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
4.6
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.6Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit. Affected is the function CFE_TBL_ValidateCodecLoadSize of the file cfe/modules/tbl/fsw/src/cfe_tbl_passthru_codec.c. The manipulation leads to integer overflow. The complexity of an attack is rather high. The exploitability is told to be difficult. A fix is planned for the upcoming version milestone of the project.

CVSS v3
4.6
EG Score
4.6(medium)
EPSS
11.2%
KEV
Not listed

Published

April 3, 2026

Last Modified

May 4, 2026

Advisory Details (2)

Auto-updated May 4, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

[SECURITY] Integer overflow in CFE_TBL_ValidateCodecLoadSize bypasses bounds check on 32-bit targets · Issue #2692 · nasa/cFE · GitHub

https://github.com/nasa/cFS/issues/954
generic

GitHub - nasa/cFS: The Core Flight System (cFS) · GitHub

https://github.com/nasa/cFS/

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:08 UTCEPSS rescore
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  9. 2026-07-17 03:24 UTCOSV refresh
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  1. 2026-07-07 13:46 UTCEPSS rescore
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  38. 2026-06-11 21:56 UTCGHSA enrichment
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  41. 2026-06-10 14:13 UTCGHSA enrichment
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  43. 2026-06-09 14:28 UTCGHSA enrichment
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  45. 2026-06-08 10:43 UTCGHSA enrichment
  46. 2026-06-07 15:25 UTCEPSS rescore
  47. 2026-06-07 10:50 UTCGHSA enrichment
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  71. 2026-05-20 19:12 UTCEG score recompute
  72. 2026-05-20 19:12 UTCGHSA enrichment
  73. 2026-05-20 11:22 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-5476?
CVE-2026-5476 is a medium vulnerability published on April 3, 2026. A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit. Affected is the function CFETBLValidateCodecLoadSize of the file cfe/modules/tbl/fsw/src/cfetblpassthru_codec.c. The manipulation leads to integer overflow. The complexity of an attack is rather high. The exploitability is told to be…
When was CVE-2026-5476 disclosed?
CVE-2026-5476 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on May 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5476 actively exploited?
CVE-2026-5476 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5476?
CVE-2026-5476 has a CVSS v3 base score of 4.6 (NVD).
How do I remediate CVE-2026-5476?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5476, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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