CVE-2026-59863

HIGHPre-NVD 7.07.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.4% (71st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
7.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.4%CVSS: 7.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, Kiota honored a poisoned .kiota/workspace.json workspace configuration without validating per-client or per-plugin outputPath values during kiota client generate and kiota plugin generate, allowing a malicious repository or pull request to use absolute paths, rooted POSIX / paths, UNC \\ or // paths, Windows drive X:\ paths, or .. traversal segments to write generated client files outside the workspace root on a developer or CI host. This issue is fixed in version 1.29.1 and 1.32.5.

CVSS v3
7.0
EG Score
7.0HIGHmedium confidence
EG Risk
32
EG Risk 32/100

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 (value × EchelonGraph’s weight)
Severity70% × 45%
The EG Score, 7.0 of 10.
Exploitation1.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.4%
EPSS %ILE
71st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 16, 2026

Last Modified

August 17, 2026

Advisory Details (4)

Auto-updated Jul 16, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
GitHub release Patch Available

v1.32.5

Patch available: microsoft/kiota v1.32.5

https://github.com/microsoft/kiota/releases/tag/v1.32.5
GitHub commit

commit 4049327872db (microsoft/kiota)

Fix landed in microsoft/kiota commit 4049327872db — awaiting tagged release

https://github.com/microsoft/kiota/commit/4049327872db7846ace35c9003774d3e3878e4e9
GitHub pull request

fix: validate workspace output paths are sub-directories

Fix merged in microsoft/kiota PR #7885 on 2026-07-01 — awaiting tagged release

https://github.com/microsoft/kiota/pull/7885
GitHub advisoryMentions a patch (unverified)

Workspace-config poisoning: out-of-repo file write + generation-time SSRF · Advisory · microsoft/kiota · GitHub

https://github.com/microsoft/kiota/security/advisories/GHSA-4rj6-vrwv-wr8m

Vendor Advisories for CVE-2026-59863(1)

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

Affected Packages

(2 across 1 ecosystem)
NuGet(2)
PackageVulnerable rangeFix by version rangeDependents
Microsoft.OpenApi.Kiota0.1.0-preview ... 1.9.1 (66 versions)
  • 1.30.0 up to 1.32.5: fixed in 1.32.5
  • every version up to 1.29.1: fixed in 1.29.1
—
Microsoft.OpenApi.Kiota.Builder0.2.0-preview ... 1.9.1 (46 versions)
  • 1.30.0 up to 1.32.5: fixed in 1.32.5
  • every version up to 1.29.1: fixed in 1.29.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 35× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 135 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 35 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  2. 2026-10-13 15:48 UTCEG score recompute
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  4. 2026-10-12 15:52 UTCEG score recompute
  5. 2026-10-11 19:36 UTCEG score recompute
  6. 2026-10-11 16:51 UTCEG score recompute
  7. 2026-10-11 14:13 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  16. 2026-10-03 14:26 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  17. 2026-10-02 17:56 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  19. 2026-10-01 11:24 UTCEG score recompute
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  21. 2026-09-29 15:22 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  23. 2026-09-28 08:36 UTCEG score recompute
  24. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  25. 2026-09-26 15:59 UTCEPSS rescoreEPSS 1.4% · 70th percentile
Show 75 more
  1. 2026-09-24 14:04 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  2. 2026-09-24 08:31 UTCEG score recompute
  3. 2026-09-23 17:54 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  4. 2026-09-23 03:02 UTCEG score recompute
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  6. 2026-09-18 04:39 UTCEG score recompute
  7. 2026-09-17 19:31 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  8. 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  9. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  10. 2026-09-15 03:11 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  11. 2026-09-13 23:09 UTCEG score recompute
  12. 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  13. 2026-09-13 07:08 UTCEG score recompute
  14. 2026-09-11 21:41 UTCEG score recompute
  15. 2026-09-11 14:53 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  16. 2026-09-10 09:35 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  17. 2026-09-08 22:01 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  18. 2026-09-08 00:31 UTCEG score recompute
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  20. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  21. 2026-09-05 20:40 UTCEG score recompute
  22. 2026-09-04 05:07 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  23. 2026-09-02 14:12 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  24. 2026-09-01 13:54 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  25. 2026-09-01 04:40 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  26. 2026-08-31 02:54 UTCEG score recompute
  27. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  28. 2026-08-30 03:35 UTCEG score recompute
  29. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  30. 2026-08-28 21:42 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  31. 2026-08-27 23:53 UTCEG score recompute
  32. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  33. 2026-08-26 22:55 UTCEG score recompute
  34. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  35. 2026-08-25 23:51 UTCEG score recompute
  36. 2026-08-25 13:49 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  37. 2026-08-24 14:43 UTCEG score recompute
  38. 2026-08-23 04:46 UTCEG score recompute
  39. 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  40. 2026-08-22 06:53 UTCEG score recompute
  41. 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  42. 2026-08-21 09:00 UTCEG score recompute
  43. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  44. 2026-08-19 23:56 UTCEG score recompute
  45. 2026-08-19 17:04 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  46. 2026-08-18 19:56 UTCEG score recompute
  47. 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  48. 2026-08-17 00:32 UTCEG score recompute
  49. 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  50. 2026-08-16 02:38 UTCEG score recompute
  51. 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  52. 2026-08-15 04:45 UTCEG score recompute
  53. 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  54. 2026-08-14 06:51 UTCEG score recompute
  55. 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  56. 2026-08-12 22:01 UTCEG score recompute
  57. 2026-08-12 13:51 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  58. 2026-08-12 00:09 UTCEG score recompute
  59. 2026-08-11 02:16 UTCEG score recompute
  60. 2026-08-11 00:00 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  61. 2026-08-09 17:27 UTCEG score recompute
  62. 2026-08-09 13:46 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  63. 2026-08-08 19:35 UTCEG score recompute
  64. 2026-08-08 16:37 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  65. 2026-08-07 21:43 UTCEG score recompute
  66. 2026-08-06 23:49 UTCEG score recompute
  67. 2026-08-06 13:47 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  68. 2026-08-06 01:57 UTCEG score recompute
  69. 2026-08-05 19:17 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  70. 2026-08-05 01:37 UTCEG score recompute
  71. 2026-08-04 15:10 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  72. 2026-08-04 14:41 UTCEG score recompute
  73. 2026-08-04 10:39 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  74. 2026-08-03 16:48 UTCEG score recompute
  75. 2026-08-03 10:36 UTCEPSS rescoreEPSS 1.1% · 63rd percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-59863?
CVE-2026-59863 is a high-severity vulnerability; its CVE record was published on July 16, 2026. Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, Kiota honored a poisoned .kiota/workspace.json workspace configuration without validating per-client or per-plugin outputPath values during kiota client generate and kiota plugin generate, allowing a malicious…
When was the CVE record for CVE-2026-59863 published?
The CVE record for CVE-2026-59863 was published on July 16, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 17, 2026; the record at its source may have been updated since.
Is CVE-2026-59863 actively exploited?
CVE-2026-59863 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.4% probability of exploitation in the next 30 days (71st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59863?
CVE-2026-59863 has a CVSS base score of 7.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-59863?
A fix for CVE-2026-59863 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59863 are linked in the Vendor Advisories panel on this page.

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