Kiota: Code injection through doc-comment delimiter reformation in Kiota Java and PHP generators
Kiota is an OpenAPI based HTTP Client code generator. From 0.5.0 until 1.35.0, Kiota's Java and PHP documentation-comment sanitizers delete block-comment terminators rather than neutralizing them, allowing overlapping characters to reform a terminator and place attacker-controlled OpenAPI text outside a generated documentation comment. The Java sanitizer also removes non-ASCII characters after deleting terminators, which can create a new terminator during normalization. Exploitation requires a developer or build pipeline to generate source from the malicious description and then compile and load the Java output or load the PHP output, after which injected code executes in the consuming application or build environment context. The version range is based on the Java defect and does not assert that PHP generation existed in every affected release. This issue is fixed in version 1.35.0.
CVE-2026-105796
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-105796
kiota
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Microsoft.OpenApi.Kiota
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Microsoft.OpenApi.Kiota.Builder
Source reference: /containers/cna/affected/2/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "microsoft",
"product": "kiota",
"versions": [
{
"status": "affected",
"version": ">= 0.5.0, < 1.35.0"
}
]
},
{
"vendor": "microsoft",
"product": "Microsoft.OpenApi.Kiota",
"versions": [
{
"status": "affected",
"version": ">= 0.5.0, < 1.35.0"
}
]
},
{
"vendor": "microsoft",
"product": "Microsoft.OpenApi.Kiota.Builder",
"versions": [
{
"status": "affected",
"version": ">= 0.5.0, < 1.35.0"
}
]
}
]- Related CVEs
- CVE-2026-105796
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #16112 · Revision 1
- Added to Heist Feed
- Publisher date