CVE-2026-39822

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open("symlink/")' will open "symlink" even when "symlink" is a symbolic link pointing outside of the root.

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
8.2%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 13, 2026

Advisory Details (4)

Auto-updated Jul 8, 2026
No patch confirmed yet.
generic

GO-2026-4970 - Go Packages

https://pkg.go.dev/vuln/GO-2026-4970
generic
https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc
generic

os: Root escape via symlink plus trailing slash (CVE-2026-39822) · Issue #79005 · golang/go · GitHub

https://go.dev/issue/79005
generic
https://go.dev/cl/797880

Vendor Advisories for CVE-2026-39822(11)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatbuildah-2:1.43.1-4.el10_22026-07-13redhat
redhatbuildah-2:1.43.1-4.el9_82026-07-13redhat
redhatpodman-6:5.8.2-5.el9_82026-07-13redhat
redhatgo-toolset:rhel8-8100020260710105056.a3795dee2026-07-13redhat
redhatgolang-0:1.26.5-1.el9_82026-07-09redhat
redhatgolang-0:1.26.5-1.el10_22026-07-09redhat
redhatgolang1-26-main-1.26.5-0.1.hum12026-07-08redhat
redhatgolang1-25-main-1.25.12-0.1.hum12026-07-08redhat

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.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
stdlib—1.27.0-rc.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 45× 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. 2026-07-23 03:10 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 02:29 UTCEPSS rescore
  6. 2026-07-18 10:04 UTCEPSS rescore
  7. 2026-07-17 01:43 UTCVendor advisory
  8. 2026-07-17 01:43 UTCGHSA enrichment
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-16 14:35 UTCVendor advisory
  11. 2026-07-16 14:35 UTCGHSA enrichment
  12. 2026-07-16 03:26 UTCVendor advisory
  13. 2026-07-16 03:26 UTCGHSA enrichment
  14. 2026-07-15 16:57 UTCEPSS rescore
  15. 2026-07-15 16:57 UTCEPSS rescore
  16. 2026-07-15 16:17 UTCVendor advisory
  17. 2026-07-15 16:16 UTCGHSA enrichment
  18. 2026-07-15 05:07 UTCVendor advisory
  19. 2026-07-15 05:07 UTCGHSA enrichment
  20. 2026-07-15 02:00 UTCEPSS rescore
  21. 2026-07-14 17:59 UTCVendor advisory
  22. 2026-07-14 17:59 UTCGHSA enrichment
  23. 2026-07-14 06:47 UTCVendor advisory
  24. 2026-07-14 06:47 UTCGHSA enrichment
  25. 2026-07-13 22:30 UTCEPSS rescore
Show 20 more
  1. 2026-07-13 19:38 UTCVendor advisory
  2. 2026-07-13 19:38 UTCGHSA enrichment
  3. 2026-07-13 08:29 UTCVendor advisory
  4. 2026-07-13 08:29 UTCGHSA enrichment
  5. 2026-07-13 06:13 UTCEPSS rescore
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-12 21:20 UTCVendor advisory
  8. 2026-07-12 21:20 UTCGHSA enrichment
  9. 2026-07-12 10:11 UTCVendor advisory
  10. 2026-07-12 10:11 UTCGHSA enrichment
  11. 2026-07-12 05:46 UTCEPSS rescore
  12. 2026-07-11 23:02 UTCEG score recompute▲ 7.80
  13. 2026-07-11 23:02 UTCVendor advisory
  14. 2026-07-11 23:02 UTCGHSA enrichment
  15. 2026-07-11 08:27 UTCEPSS rescore
  16. 2026-07-09 19:10 UTCEPSS rescore
  17. 2026-07-08 19:44 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  18. 2026-07-08 18:52 UTCNVD update
  19. 2026-07-08 16:25 UTCEG score recompute
  20. 2026-07-08 16:24 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-39822?
CVE-2026-39822 is a high vulnerability published on July 8, 2026. On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open("symlink/")' will open "symlink" even when "symlink" is a symbolic link pointing…
When was CVE-2026-39822 disclosed?
CVE-2026-39822 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39822 actively exploited?
CVE-2026-39822 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39822?
CVE-2026-39822 has a CVSS v3.1 base score of 7.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-39822?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39822, 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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