CVE-2026-59860

HIGHPre-NVD 8.78.7
EchelonGraph scoreLOW confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: secondary
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 8.7Exploit: NoneExposed: 0

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

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.32.3, Kiota is affected by a code-generation injection vulnerability in the C# XML documentation-comment sink (the description, externalDocs label, and externalDocs link fields emitted as /// … comments). When text from an OpenAPI description is written into single-line XML doc comments without stripping newline and Unicode line-terminator characters, an attacker can break out of the /// comment line and inject additional code into generated C# clients. This issue is fixed in version 1.32.3.

CVSS v3
8.7
EG Score
8.7(low)
EPSS
—
KEV
Not listed

Published

July 16, 2026

Last Modified

July 17, 2026

Advisory Details (4)

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

v1.32.3

Patch available: microsoft/kiota v1.32.3

https://github.com/microsoft/kiota/releases/tag/v1.32.3
github_commit

commit ebb632db90aa (microsoft/kiota)

Fix landed in microsoft/kiota commit ebb632db90aa — awaiting tagged release

https://github.com/microsoft/kiota/commit/ebb632db90aa8e3c20949337d9faa2720d64ca44
github_pr

fix(csharp): strip newlines from doc comment text to prevent code injection

Fix merged in microsoft/kiota PR #7831 on 2026-06-24 — awaiting tagged release

https://github.com/microsoft/kiota/pull/7831
github Patch Available

CVE Advisory: XML Doc-Comment Newline Breakout Code Injection in Kiota · Advisory · microsoft/kiota · GitHub

https://github.com/microsoft/kiota/security/advisories/GHSA-3hrf-2gc2-mx32

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 3× 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. 2026-07-17 01:59 UTCEG score recompute
  2. 2026-07-16 14:45 UTCEG score recompute
  3. 2026-07-16 14:44 UTCMITRE cvelistV5first tracked

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Frequently asked(4)

What is CVE-2026-59860?
CVE-2026-59860 is a high vulnerability published on July 16, 2026. Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.32.3, Kiota is affected by a code-generation injection vulnerability in the C# XML documentation-comment sink (the description, externalDocs label, and externalDocs link fields emitted as /// … comments). When text from an OpenAPI…
When was CVE-2026-59860 disclosed?
CVE-2026-59860 was first published in the National Vulnerability Database on July 16, 2026, with the most recent update on July 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-59860?
CVE-2026-59860 has a CVSS v3 base score of 8.7 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-59860?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59860, 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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