# CVE-2026-19363 — lmammino oidc-authorizer

> As of 2026-08-11, CVE-2026-19363 is a MEDIUM-severity vulnerability in lmammino oidc-authorizer, CVSS v3.1 5.3. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-19363 as of 2026-08-11; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-11

## What is CVE-2026-19363?

A vulnerability was found in lmammino oidc-authorizer up to 0.4.0. Impacted is an unknown function of the file src/handler.rs of the component Lambda Authorizer. The manipulation results in sensitive information in log files. The attack can be executed remotely. `src/handler.rs` logs raw Authorization header values and complete bearer tokens/JWTs on authentication failure paths, potentially exposing credentials through CloudWatch Logs. `src/models.rs` serializes the complete validated JWT claims set with `serde_json::to_string(token_claims).unwrap()` and propagates it through `context["jwtClaims"]` to downstream integrations. This code performs serialization, not deserialization, and does not process attacker-controlled `jwtClaims` input. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

The record classifies CVE-2026-19363 under weakness classes [CWE-532](https://intel.threadlinqs.com/cwe/CWE-532), [CWE-200](https://intel.threadlinqs.com/cwe/CWE-200). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 57 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 5.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R`)
- **CVSS v4.0 base score:** 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-09, last modified 2026-08-11

## Is CVE-2026-19363 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **lmammino**: oidc-authorizer

## How to fix CVE-2026-19363

No vendor patch reference has been recorded for CVE-2026-19363 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-19363

No threat campaign in the Threadlinqs corpus currently references CVE-2026-19363, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org. Last verified by Threadlinqs on 2026-08-11.

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/387217/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-19363)
- [vuldb.com — third party advisory (866093)](https://vuldb.com/submit/866093)

**Vulnerability database entry**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/387217)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-19363
Full detection coverage and IOCs for threats exploiting CVE-2026-19363 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp