CVE-2026-39822

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM 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
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

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
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
12th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 8, 2026

Last Modified

September 17, 2026

Advisory Details (4)

Auto-updated Jul 8, 2026
Patch available.
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(20)

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

Patch Availability(25)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatquay/quay-rhel8:17885938432026-09-22redhat
redhatquay/quay-rhel9:17895637532026-09-21redhat
redhatopenshift-0:4.21.0-202609022229.p2.g93afd70.assembly.stream.el102026-09-15redhat
redhatopenshift-0:4.20.0-202609041738.p2.g4012064.assembly.stream.el82026-09-15redhat
redhatgolang-0:1.26.5-1.el9_22026-08-31redhat
redhatopenshift-0:4.22.0-202608190726.p2.g05744ab.assembly.stream.el82026-08-25redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17875844872026-08-24redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17875844862026-08-24redhat
redhatgolang-0:1.26.5-1.el9_42026-08-20redhat
redhatrhosdt/opentelemetry-rhel9-operator:17866351752026-08-13redhat
redhatquay/quay-rhel8:17863950652026-08-11redhat
redhatquay/quay-rhel8:17861706352026-08-10redhat
redhatquay/quay-rhel8:17859500042026-08-05redhat
redhatgolang-0:1.26.5-1.el9_62026-08-03redhat
redhatgolang-0:1.26.5-1.el10_02026-08-03redhat
redhatadvanced-cluster-security/rhacs-main-rhel9:17854158682026-07-30redhat
redhatrhosdt/tempo-rhel9-operator:17847757822026-07-23redhat
redhatbuildah-2:1.43.1-4.el9_82026-07-13redhat
redhatgo-toolset:rhel8-8100020260710105056.a3795dee2026-07-13redhat
redhatbuildah-2:1.43.1-4.el10_22026-07-13redhat
redhatpodman-6:5.8.2-5.el9_82026-07-13redhat
redhatgolang-0:1.26.5-1.el10_22026-07-09redhat
redhatgolang-0:1.26.5-1.el9_82026-07-09redhat
redhatgolang1-25-main-1.25.12-0.1.hum12026-07-08redhat
redhatgolang1-26-main-1.26.5-0.1.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

(5 across 3 ecosystems)
Debian:14(3)
PackageVulnerable rangeFix by version rangeDependents
golang-1.251.25.0-1 ... 1.25.9-1 (17 versions)
  • every version up to 1.25.12-1: fixed in 1.25.12-1
—
golang-1.261.26.0-1 ... 1.26~rc3-2 (15 versions)
  • every version up to 1.26.5-1: fixed in 1.26.5-1
—
golang-1.271.27~rc1-1
  • every version up to 1.27~rc2-1: fixed in 1.27~rc2-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
golang-1.241.24.12-1 ... 1.24.9-1 (10 versions)
  • every version on: no fix on record
—
Go(1)
PackageVulnerable rangeFix by version rangeDependents
stdlib—
  • every version up to 1.25.12: fixed in 1.25.12
  • 1.26.0-0 up to 1.26.5: fixed in 1.26.5
  • 1.27.0-0 up to 1.27.0-rc.2: fixed in 1.27.0-rc.2
—

Weakness Classification(1)

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

Additional Vendor Advisories

(7)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 55× 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 323 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

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 on July 8, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39822 actively exploited?
CVE-2026-39822 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2026-39822 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-39822 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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