CVE-2026-56860

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreHIGH confidence

Score 5.9 from GitHub Security Advisory published 2026-08-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: None knownExposed: 0

A fix is available — apply it.

Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for '..' segments, eliminating the quadratic time complexity and significantly reducing memory allocations.

CVSS v3
5.9
EG Score
5.9(high)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 14, 2026

Advisory Details (4)

Auto-updated Aug 14, 2026
No patch confirmed yet.
generic

GO-2026-6218 - Go Packages

https://pkg.go.dev/vuln/GO-2026-6218
generic
https://groups.google.com/g/golang-announce/c/94pEornpRlI
generic

net/url: quadratic complexity in resolvePath when processing backtrack path elements · Issue #80494 · golang/go · GitHub

https://go.dev/issue/80494
generic
https://go.dev/cl/803681

Vendor Advisories for CVE-2026-56860(3)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatgolang1-26-main-1.26.6-0.1.hum12026-08-14redhat
redhatgolang1-25-main-1.25.13-0.1.hum12026-08-14redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 30× 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. 2026-08-21 06:03 UTCEG score recompute
  2. 2026-08-21 06:03 UTCVendor advisory
  3. 2026-08-21 06:03 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 03:58 UTCEG score recompute
  6. 2026-08-20 03:58 UTCVendor advisory
  7. 2026-08-20 03:58 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 01:53 UTCEG score recompute
  10. 2026-08-19 01:53 UTCVendor advisory
  11. 2026-08-19 01:53 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-17 23:48 UTCEG score recompute
  14. 2026-08-17 23:48 UTCVendor advisory
  15. 2026-08-17 23:48 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-16 21:43 UTCEG score recompute
  18. 2026-08-16 21:43 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 02:14 UTCEPSS rescore
  21. 2026-08-15 19:38 UTCEG score recompute
  22. 2026-08-15 19:38 UTCGHSA enrichment
  23. 2026-08-15 01:30 UTCEPSS rescore
  24. 2026-08-14 17:33 UTCGHSA enrichment
  25. 2026-08-14 16:25 UTCEG score recompute▲ 5.90
Show 5 more
  1. 2026-08-14 16:25 UTCGHSA enrichment
  2. 2026-08-14 16:24 UTCMITRE cvelistV5CVSS v3 → 5.9 · severity → MEDIUM
  3. 2026-08-13 22:25 UTCNVD update
  4. 2026-08-13 22:09 UTCEG score recompute
  5. 2026-08-13 22:09 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-56860?
CVE-2026-56860 is a medium vulnerability published on August 13, 2026. Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking…
When was CVE-2026-56860 disclosed?
CVE-2026-56860 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56860 actively exploited?
CVE-2026-56860 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 63.1% of all scored CVEs.
What is the CVSS score of CVE-2026-56860?
CVE-2026-56860 has a CVSS v3.1 base score of 5.9 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-56860?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56860, 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

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