CVE-2026-56852

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-21. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Jul 23, 2026
No patch confirmed yet.
generic

GO-2026-5970 - Go Packages

https://pkg.go.dev/vuln/GO-2026-5970
generic

x/text/unicode/norm: infinite loop on truncated/invalid UTF-8 input · Issue #80142 · golang/go · GitHub

https://go.dev/issue/80142
generic
https://go.dev/cl/794100

Vendor Advisories for CVE-2026-56852(2)

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

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
golang.org/x/text—0.39.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 27× 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. 2026-07-27 19:09 UTCEG score recompute
  2. 2026-07-27 19:09 UTCGHSA enrichment
  3. 2026-07-27 14:14 UTCEPSS rescore
  4. 2026-07-27 06:05 UTCGHSA enrichment
  5. 2026-07-26 17:13 UTCEG score recompute
  6. 2026-07-26 17:13 UTCGHSA enrichment
  7. 2026-07-26 14:54 UTCEPSS rescore
  8. 2026-07-26 14:54 UTCEPSS rescore
  9. 2026-07-26 04:19 UTCEG score recompute
  10. 2026-07-26 04:19 UTCGHSA enrichment
  11. 2026-07-25 14:18 UTCEPSS rescore
  12. 2026-07-25 14:18 UTCEPSS rescore
  13. 2026-07-24 14:18 UTCEPSS rescore
  14. 2026-07-24 14:18 UTCEPSS rescore
  15. 2026-07-23 14:18 UTCEPSS rescore
  16. 2026-07-23 14:10 UTCEG score recompute▲ 7.50
  17. 2026-07-23 14:10 UTCGHSA enrichment
  18. 2026-07-23 14:09 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  19. 2026-07-23 03:20 UTCEG score recompute
  20. 2026-07-22 23:00 UTCEG score recompute
  21. 2026-07-22 23:00 UTCGHSA enrichment
  22. 2026-07-22 14:08 UTCEPSS rescore
  23. 2026-07-21 21:38 UTCGHSA enrichment
  24. 2026-07-21 21:36 UTCGHSA enrichment
  25. 2026-07-21 21:19 UTCNVD update
Show 2 more
  1. 2026-07-21 19:44 UTCEG score recompute
  2. 2026-07-21 19:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-56852?
CVE-2026-56852 is a high vulnerability published on July 21, 2026. A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes.
When was CVE-2026-56852 disclosed?
CVE-2026-56852 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56852 actively exploited?
CVE-2026-56852 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 63.5% of all scored CVEs.
What is the CVSS score of CVE-2026-56852?
CVE-2026-56852 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-56852?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56852, 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-2026-56852

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