# CVE-2026-45173: Idira Identity Browser Extension: Unauthorized Application Interaction via Origin Validation Failure

> Attackers can bypass origin validation to trigger unauthorized application interactions or execute parameters in an authenticated user's browser session.

- **Severity:** High 8.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N/U:Amber`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 Jun 2026
- **Updated:** 12 Jun 2026
- **Also known as:** GHSA-mmjg-x39c-438q

## What is CVE-2026-45173?

CVE-2026-45173 is a high-severity vulnerability in CyberArk Software, a Palo Alto Networks Company Identity Browser Extensions, published on 11 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Idira Identity Browser Extension (Chrome, Firefox, and Edge builds) versions prior to 26.8.1 exhibit an origin validation flaw within its internal web-page verification routines. If an authenticated user navigates to a specially crafted webpage, this interaction could potentially allow a remote attacker to trigger unauthorized application interaction or execution parameters within the context of that authenticated browser session. CyberArk Security Bulletin: CA26-21

Weakness: CWE-346 (Origin Validation Error)

## Which versions are affected by CVE-2026-45173?

It affects 1 product.


Products: Paloaltonetworks Idira Identity Browser Extension.

## How do I fix CVE-2026-45173?

No fix has been published for CVE-2026-45173 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-45173 being exploited?

There is no known exploitation of CVE-2026-45173 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-45173 and fix it if it is affected.

What it is: CVE-2026-45173 is a high-severity vulnerability in CyberArk Software, a Palo Alto Networks Company Identity Browser Extensions, published on 11 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-45173 in the wild and no public exploit code.

Affected product: CyberArk Software, a Palo Alto Networks Company Identity Browser Extensions. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-45173/ (Markdown: https://insights.sbomify.com/CVE-2026-45173/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-45173
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-45173
- OSV: https://osv.dev/vulnerability/CVE-2026-45173

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-45173/
Summaries are generated and may contain mistakes; the official description above is the record.