How severe is CVE-2026-33768?

CVE-2026-33768 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-33768 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33768?

CVE-2026-33768 affects Astro @astrojs/vercel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33768?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33768 have an EU (EUVD) identifier?

Yes. CVE-2026-33768 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14982.

When was CVE-2026-33768 published?

CVE-2026-33768 was published on 2026-03-24 and last updated on 2026-06-17.

CVE-2026-33768

CVE-2026-33768 is a medium-severity vulnerability in Astro @astrojs/vercel with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-441.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-14982
Weakness: CWE-441
Affected product: Astro @astrojs/vercel
Published: 2026-03-24
Last modified: 2026-06-17

Description

Astro is a web framework. Prior to version 10.0.2, the @astrojs/vercel serverless entrypoint reads the x-astro-path header and x_astro_path query parameter to rewrite the internal request path, with no authentication whatsoever. On deployments without Edge Middleware, this lets anyone bypass Vercel's platform-level path restrictions entirely. The override preserves the original HTTP method and body, so this isn't limited to GET. POST, PUT, DELETE all land on the rewritten path. A Firewall rule blocking /admin/* does nothing when the request comes in as POST /api/health?x_astro_path=/admin/delete-user. This issue has been patched in version 10.0.2.

Frequently asked questions

What is CVE-2026-33768?: Astro is a web framework. Prior to version 10.0.2, the @astrojs/vercel serverless entrypoint reads the x-astro-path header and x_astro_path query parameter to rewrite the internal request path, with no authentication whatsoever. On deployments without Edge Middleware, this lets anyone bypass Vercel's platform-level path restrictions entirely. The override preserves the original HTTP method and body, so this isn't limited to GET. POST, PUT, DELETE all land on the rewritten path. A Firewall rule blocking /admin/* does nothing when the request comes in as POST /api/health?x_astro_path=/admin/delete-user. This issue has been patched in version 10.0.2.
How severe is CVE-2026-33768?: CVE-2026-33768 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-33768 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33768?: CVE-2026-33768 affects Astro @astrojs/vercel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33768?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33768 have an EU (EUVD) identifier?: Yes. CVE-2026-33768 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14982.
When was CVE-2026-33768 published?: CVE-2026-33768 was published on 2026-03-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:astro:\@astrojs\/vercel:*:*:*:*:*:*:*:*

Other CWE-441 vulnerabilities

CVE-2026-39906 — Critical (CVSS 10.0): Unisys WebPerfect Image Suite versions 3.0.3960.22810 and 3.0.3960.22604 expose a deprecated .NET Remoting TCP channel…
CVE-2025-62718 — Critical (CVSS 9.9): Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.0 and 0.31.0, Axios does not correctly…
CVE-2025-64123 — Critical (CVSS 9.8): Unintended Proxy or Intermediary vulnerability in Nuvation Energy Multi-Stack Controller (MSC) allows Network Boundary…
CVE-2021-20042 — Critical (CVSS 9.8): An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass…
CVE-2025-64125 — Critical (CVSS 9.4): A vulnerability in Nuvation Energy nCloud VPN Service allowed Network Boundary Bridging.This issue affected the nCloud…
CVE-2026-24471 — Critical (CVSS 9.3): continuwuity is a Matrix homeserver written in Rust. This vulnerability allows an attacker with a malicious remote…

Browse all CWE-441 vulnerabilities →