CVE-2026-56788

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Elevated
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: Elevated riskExposed: 0

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

RTKLIB through 2.4.3 contains an out-of-bounds read vulnerability in getcodepri function when processing unrecognized RINEX observation codes, allowing attackers to trigger denial of service. Crafted RINEX files with unknown observation types cause negative array indexing into the codepris table, resulting in reliable crashes and potential memory disclosure of adjacent global data.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: Track

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
Severity71% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Jun 25, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

RTKLIB 2.4.3 - Out-of-bounds Read via Negative Array Index in getcodepri | Advisories | VulnCheck

https://www.vulncheck.com/advisories/rtklib-out-of-bounds-read-via-negative-array-index-in-getcodepri
generic🟡 PoC Available

Global-Buffer-Overflow in RTKLIB `getcodepri` via Unrecognized RINEX Observation Code · Issue #797 · tomojitakasu/RTKLIB · GitHub

https://github.com/tomojitakasu/RTKLIB/issues/797

Vendor Advisories for CVE-2026-56788(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
rtklib2.4.3+dfsg1-2.1 ... 2.4.3.b34+dfsg-1 (8 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
rtklib2.4.3.b34+dfsg-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
rtklib2.4.3.b34+dfsg-1——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 63× 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 194 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 09:35 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 13:47 UTCEPSS rescore
  6. 2026-09-04 05:07 UTCEPSS rescore
  7. 2026-09-02 14:12 UTCEPSS rescore
  8. 2026-09-01 13:54 UTCEPSS rescore
  9. 2026-09-01 04:40 UTCEPSS rescore
  10. 2026-08-30 19:31 UTCEG score recompute
  11. 2026-08-30 19:31 UTCGHSA enrichment
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 01:22 UTCEPSS rescore
  14. 2026-08-28 21:42 UTCEPSS rescore
  15. 2026-08-27 23:17 UTCEG score recompute
  16. 2026-08-27 23:17 UTCGHSA enrichment
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:46 UTCEPSS rescore
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-25 00:46 UTCEG score recompute
  21. 2026-08-25 00:45 UTCGHSA enrichment
  22. 2026-08-24 13:09 UTCEG score recompute
  23. 2026-08-24 13:09 UTCGHSA enrichment
  24. 2026-08-23 21:22 UTCGHSA enrichment
  25. 2026-08-23 09:50 UTCEG score recompute
Show 75 more
  1. 2026-08-23 09:50 UTCGHSA enrichment
  2. 2026-08-23 00:19 UTCEPSS rescore
  3. 2026-08-22 22:22 UTCGHSA enrichment
  4. 2026-08-22 10:01 UTCEG score recompute
  5. 2026-08-22 10:00 UTCGHSA enrichment
  6. 2026-08-21 23:49 UTCEPSS rescore
  7. 2026-08-21 17:33 UTCGHSA enrichment
  8. 2026-08-21 06:00 UTCEG score recompute
  9. 2026-08-21 06:00 UTCGHSA enrichment
  10. 2026-08-20 22:55 UTCEPSS rescore
  11. 2026-08-20 18:31 UTCGHSA enrichment
  12. 2026-08-20 07:02 UTCEG score recompute
  13. 2026-08-20 07:02 UTCGHSA enrichment
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-19 12:43 UTCGHSA enrichment
  16. 2026-08-19 01:14 UTCEG score recompute
  17. 2026-08-19 01:14 UTCGHSA enrichment
  18. 2026-08-18 13:48 UTCEPSS rescore
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-17 07:30 UTCGHSA enrichment
  21. 2026-08-16 20:02 UTCEG score recompute
  22. 2026-08-16 20:02 UTCGHSA enrichment
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 07:27 UTCEG score recompute
  25. 2026-08-16 07:27 UTCGHSA enrichment
  26. 2026-08-16 02:14 UTCEPSS rescore
  27. 2026-08-15 19:59 UTCGHSA enrichment
  28. 2026-08-15 08:27 UTCEG score recompute
  29. 2026-08-15 08:27 UTCGHSA enrichment
  30. 2026-08-15 01:30 UTCEPSS rescore
  31. 2026-08-14 19:09 UTCGHSA enrichment
  32. 2026-08-14 07:40 UTCEG score recompute
  33. 2026-08-14 07:40 UTCGHSA enrichment
  34. 2026-08-13 22:00 UTCEPSS rescore
  35. 2026-08-13 20:11 UTCGHSA enrichment
  36. 2026-08-13 08:43 UTCGHSA enrichment
  37. 2026-08-12 21:14 UTCEG score recompute
  38. 2026-08-12 21:14 UTCGHSA enrichment
  39. 2026-08-12 13:51 UTCEPSS rescore
  40. 2026-08-12 09:46 UTCGHSA enrichment
  41. 2026-08-11 22:17 UTCEG score recompute
  42. 2026-08-11 22:17 UTCGHSA enrichment
  43. 2026-08-11 10:48 UTCEG score recompute
  44. 2026-08-11 10:48 UTCGHSA enrichment
  45. 2026-08-11 00:00 UTCEPSS rescore
  46. 2026-08-10 23:20 UTCGHSA enrichment
  47. 2026-08-10 11:51 UTCGHSA enrichment
  48. 2026-08-10 00:23 UTCEG score recompute
  49. 2026-08-10 00:23 UTCGHSA enrichment
  50. 2026-08-09 13:46 UTCEPSS rescore
  51. 2026-08-09 12:54 UTCGHSA enrichment
  52. 2026-08-09 01:26 UTCEG score recompute
  53. 2026-08-09 01:26 UTCGHSA enrichment
  54. 2026-08-08 16:37 UTCEPSS rescore
  55. 2026-08-08 13:57 UTCGHSA enrichment
  56. 2026-08-08 02:28 UTCEG score recompute
  57. 2026-08-08 02:28 UTCGHSA enrichment
  58. 2026-08-07 14:59 UTCGHSA enrichment
  59. 2026-08-07 03:30 UTCGHSA enrichment
  60. 2026-08-06 16:01 UTCEG score recompute
  61. 2026-08-06 16:01 UTCGHSA enrichment
  62. 2026-08-06 13:47 UTCEPSS rescore
  63. 2026-08-06 04:32 UTCEG score recompute
  64. 2026-08-06 04:32 UTCGHSA enrichment
  65. 2026-08-05 19:17 UTCEPSS rescore
  66. 2026-08-05 17:03 UTCGHSA enrichment
  67. 2026-08-05 02:32 UTCEG score recompute
  68. 2026-08-05 02:32 UTCGHSA enrichment
  69. 2026-08-04 15:10 UTCEPSS rescore
  70. 2026-08-04 15:03 UTCEG score recompute
  71. 2026-08-04 15:03 UTCGHSA enrichment
  72. 2026-08-04 10:39 UTCEPSS rescore
  73. 2026-08-04 01:26 UTCGHSA enrichment
  74. 2026-08-03 13:57 UTCEG score recompute
  75. 2026-08-03 13:57 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-56788?
CVE-2026-56788 is a high vulnerability published on June 25, 2026. RTKLIB through 2.4.3 contains an out-of-bounds read vulnerability in getcodepri function when processing unrecognized RINEX observation codes, allowing attackers to trigger denial of service. Crafted RINEX files with unknown observation types cause negative array indexing into the codepris table,…
When was CVE-2026-56788 disclosed?
CVE-2026-56788 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56788 actively exploited?
CVE-2026-56788 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.2% of all scored CVEs.
What is the CVSS score of CVE-2026-56788?
CVE-2026-56788 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-56788?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56788, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-56788

Explore →

Is Your Infrastructure Affected by CVE-2026-56788?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs