# CVE-2026-26004: Sentry allows unauthorized access to event data across organizational boundaries

> Attackers can access event data across organizational boundaries via an IDOR vulnerability in Sentry's GroupEventJsonView endpoint.

- **Severity:** Medium 5.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Mar 2026
- **Updated:** 18 Mar 2026

## What is CVE-2026-26004?

CVE-2026-26004 is a medium-severity missing authorization vulnerability in getsentry sentry, published on 17 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Sentry is a developer-first error tracking and performance monitoring tool. Versions prior to 26.1.0 have a cross-organization Insecure Direct Object Reference (IDOR) vulnerability in Sentry's GroupEventJsonView endpoint. Version 26.1.0 patches the issue.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-26004?

It affects 1 product.


Products: Sentry Sentry.

## How do I fix CVE-2026-26004?

No fix has been published for CVE-2026-26004 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-26004 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26004 exists.

## Other vulnerabilities in getsentry sentry

- [CVE-2026-42354](https://insights.sbomify.com/CVE-2026-42354/): Sentry: Improper authentication on SAML SSO process allows user identity linking (critical 9.1)
- [CVE-2026-27197](https://insights.sbomify.com/CVE-2026-27197/): Sentry: Improper Authentication on SAML SSO process allows user identity linking (critical 9.1)
- [CVE-2021-47935](https://insights.sbomify.com/CVE-2021-47935/): Sentry 8.2.0 Remote Code Execution via Pickle Deserialization (high 8.7)
- [CVE-2023-39349](https://insights.sbomify.com/CVE-2023-39349/): Sentry vulnerable to privilege escalation via ApiTokensEndpoint (high 8.1)
- [CVE-2023-36826](https://insights.sbomify.com/CVE-2023-36826/): Sentry vulnerable to improper authorization on debug and artifact file downloads (high 7.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-26004 and fix it if it is affected.

What it is: CVE-2026-26004 is a medium-severity missing authorization vulnerability in getsentry sentry, published on 17 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26004 exists.

Affected product: getsentry sentry. 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-2026-26004/ (Markdown: https://insights.sbomify.com/CVE-2026-26004/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-26004
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-26004
- OSV: https://osv.dev/vulnerability/CVE-2026-26004

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-26004/
Summaries are generated and may contain mistakes; the official description above is the record.