CVE-2026-22026

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 57% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to version 1.4.3, the libcurl write_callback function in the KMC crypto service client allows unbounded memory growth by reallocating response buffers without any size limit or overflow check. A malicious KMC server can return arbitrarily large HTTP responses, forcing the client to allocate excessive memory until the process is terminated by the OS. This issue has been patched in version 1.4.3.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

January 10, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 6, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github.
github Patch Available🟡 PoC Available

Unbounded Memory Allocation in KMC HTTP Response Handler Allows Resource Exhaustion · Advisory · nasa/CryptoLib · GitHub

https://github.com/nasa/CryptoLib/security/advisories/GHSA-w9cm-q69w-34x7
github_release Patch Available

v1.4.3

Patch available: nasa/CryptoLib v1.4.3

https://github.com/nasa/CryptoLib/releases/tag/v1.4.3
github_commit Patch Available

commit 2372efd3da1c (nasa/CryptoLib)

Patch available: nasa/CryptoLib v1.4.3 (contains commit 2372efd3da1c)

https://github.com/nasa/CryptoLib/commit/2372efd3da1ccb226b4297222e25f41ecc84821d

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 26× 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.

Showing the most recent 100 of 151 total refreshes for this CVE.

  1. 2026-09-19 05:30 UTCOSV refresh
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-16 14:07 UTCEPSS rescore
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  17. 2026-08-31 08:58 UTCOSV refresh
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  1. 2026-08-20 22:55 UTCEPSS rescore
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  8. 2026-08-14 15:12 UTCEG score recompute
  9. 2026-08-13 22:00 UTCEPSS rescore
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  13. 2026-08-09 20:41 UTCEG score recompute
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  23. 2026-08-02 02:26 UTCEPSS rescore
  24. 2026-08-01 04:15 UTCEPSS rescore
  25. 2026-07-30 01:30 UTCEPSS rescore
  26. 2026-07-27 14:13 UTCEPSS rescore
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  34. 2026-07-23 10:49 UTCOSV refresh
  35. 2026-07-23 03:06 UTCEG score recompute
  36. 2026-07-22 14:08 UTCEPSS rescore
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  46. 2026-07-16 17:03 UTCEPSS rescore
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  48. 2026-07-15 16:57 UTCEPSS rescore
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  55. 2026-07-12 05:46 UTCEPSS rescore
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  57. 2026-07-11 08:27 UTCEPSS rescore
  58. 2026-07-09 19:10 UTCEPSS rescore
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  62. 2026-07-06 16:27 UTCEPSS rescore
  63. 2026-07-06 16:27 UTCEPSS rescore
  64. 2026-07-06 06:02 UTCOSV refresh
  65. 2026-07-06 02:23 UTCEPSS rescore
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  67. 2026-07-05 02:30 UTCEPSS rescore
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  72. 2026-06-30 23:22 UTCEPSS rescore
  73. 2026-06-30 23:22 UTCEPSS rescore
  74. 2026-06-29 14:06 UTCEPSS rescore
  75. 2026-06-28 14:07 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-22026?
CVE-2026-22026 is a high vulnerability published on January 10, 2026. CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to version 1.4.3, the libcurl write_callback function in the…
When was CVE-2026-22026 disclosed?
CVE-2026-22026 was first published in the National Vulnerability Database on January 10, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-22026 actively exploited?
CVE-2026-22026 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.0% of all scored CVEs.
What is the CVSS score of CVE-2026-22026?
CVE-2026-22026 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-22026?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-22026, 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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