CVE-2026-73424

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (30th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Astro is a web framework for content-driven websites. From 10.0.3 until 11.0.3, the Astro Vercel adapter in packages/integrations/vercel/src/serverless/entrypoint.ts accepts x_astro_path for the public /_isr function based only on the x-vercel-isr header, allowing unauthenticated GET requests to render routes protected only by Vercel edge path rules or split edge middleware. This issue is fixed in 11.0.3.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
60
EG Risk 60/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
30th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 17, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 17, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit.
github_commit Patch Available

commit 3a43cf0f3690 (withastro/astro)

Patch available: withastro/astro @astrojs/[email protected] (contains commit 3a43cf0f3690)

https://github.com/withastro/astro/commit/3a43cf0f3690a8e33cb30109bc5165611cf38fcd
github_pr Patch Available

fix(@astrojs/vercel): improve internal ISR route handling

Patch available: withastro/astro @astrojs/[email protected] (PR #17370 merged 2026-07-13)

https://github.com/withastro/astro/pull/17370
githubMentions a patch (unverified)🟡 PoC Available

Unauthenticated path override in the @astrojs/vercel ISR function · Advisory · withastro/astro · GitHub

Affected: 10.0.2 by commit

https://github.com/withastro/astro/security/advisories/GHSA-x27w-589x-frm2

Vendor Advisories for CVE-2026-73424(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@astrojs/vercel—
  • 10.0.3 up to 11.0.3: fixed in 11.0.3
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:13 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
  4. 2026-10-07 11:26 UTCEG score recompute
  5. 2026-10-06 15:18 UTCEPSS rescore
  6. 2026-10-06 12:57 UTCEG score recompute
  7. 2026-10-05 17:43 UTCEPSS rescore
  8. 2026-10-05 14:33 UTCEG score recompute
  9. 2026-10-04 23:22 UTCEPSS rescore
  10. 2026-10-03 17:48 UTCEG score recompute
  11. 2026-10-03 14:26 UTCEPSS rescore
  12. 2026-10-02 06:57 UTCEG score recompute
  13. 2026-10-01 19:50 UTCEPSS rescore
  14. 2026-10-01 08:07 UTCEG score recompute
  15. 2026-09-30 10:00 UTCEG score recompute
  16. 2026-09-29 15:24 UTCEPSS rescore
  17. 2026-09-29 04:23 UTCEG score recompute
  18. 2026-09-28 13:52 UTCEPSS rescore
  19. 2026-09-28 06:13 UTCEG score recompute
  20. 2026-09-27 13:48 UTCEPSS rescore
  21. 2026-09-27 08:06 UTCEG score recompute
  22. 2026-09-26 15:59 UTCEPSS rescore
  23. 2026-09-25 02:02 UTCEG score recompute
  24. 2026-09-23 20:27 UTCEG score recompute
  25. 2026-09-23 17:54 UTCEPSS rescore
Show 65 more
  1. 2026-09-22 22:03 UTCEG score recompute
  2. 2026-09-21 23:57 UTCEG score recompute
  3. 2026-09-21 21:09 UTCEPSS rescore
  4. 2026-09-21 01:49 UTCEG score recompute
  5. 2026-09-20 20:16 UTCEPSS rescore
  6. 2026-09-19 04:51 UTCEG score recompute
  7. 2026-09-18 19:28 UTCEPSS rescore
  8. 2026-09-18 06:43 UTCEG score recompute
  9. 2026-09-17 08:36 UTCEG score recompute
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 10:14 UTCEG score recompute
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 11:44 UTCEG score recompute
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-14 12:05 UTCEG score recompute
  16. 2026-09-12 15:49 UTCEG score recompute
  17. 2026-09-12 15:02 UTCEPSS rescore
  18. 2026-09-11 17:42 UTCEG score recompute
  19. 2026-09-11 14:53 UTCEPSS rescore
  20. 2026-09-10 19:35 UTCEG score recompute
  21. 2026-09-10 09:35 UTCEPSS rescore
  22. 2026-09-09 03:39 UTCEG score recompute
  23. 2026-09-08 22:01 UTCEPSS rescore
  24. 2026-09-07 16:11 UTCEG score recompute
  25. 2026-09-06 15:22 UTCEG score recompute
  26. 2026-09-06 13:48 UTCEPSS rescore
  27. 2026-09-05 17:13 UTCEG score recompute
  28. 2026-09-04 19:04 UTCEG score recompute
  29. 2026-09-04 05:07 UTCEPSS rescore
  30. 2026-09-02 22:10 UTCEG score recompute
  31. 2026-09-02 14:12 UTCEPSS rescore
  32. 2026-09-01 22:00 UTCEG score recompute
  33. 2026-09-01 13:54 UTCEPSS rescore
  34. 2026-09-01 04:40 UTCEPSS rescore
  35. 2026-09-01 04:40 UTCEPSS rescore
  36. 2026-08-31 01:46 UTCEG score recompute
  37. 2026-08-30 19:18 UTCEPSS rescore
  38. 2026-08-30 19:17 UTCEPSS rescore
  39. 2026-08-30 03:39 UTCEG score recompute
  40. 2026-08-30 01:22 UTCEPSS rescore
  41. 2026-08-29 05:31 UTCEG score recompute
  42. 2026-08-28 21:42 UTCEPSS rescore
  43. 2026-08-27 20:40 UTCEG score recompute
  44. 2026-08-27 14:25 UTCEPSS rescore
  45. 2026-08-26 22:32 UTCEG score recompute
  46. 2026-08-26 14:47 UTCEPSS rescore
  47. 2026-08-26 00:25 UTCEG score recompute
  48. 2026-08-25 13:49 UTCEPSS rescore
  49. 2026-08-25 02:14 UTCEG score recompute
  50. 2026-08-23 06:01 UTCEG score recompute
  51. 2026-08-23 00:19 UTCEPSS rescore
  52. 2026-08-22 07:54 UTCEG score recompute
  53. 2026-08-21 23:49 UTCEPSS rescore
  54. 2026-08-21 09:46 UTCEG score recompute
  55. 2026-08-20 22:56 UTCEPSS rescore
  56. 2026-08-20 11:39 UTCEG score recompute
  57. 2026-08-19 17:04 UTCEPSS rescore
  58. 2026-08-19 13:31 UTCEG score recompute
  59. 2026-08-18 15:25 UTCEG score recompute
  60. 2026-08-18 15:09 UTCEG score recompute
  61. 2026-08-18 13:49 UTCEPSS rescore
  62. 2026-08-18 13:49 UTCEPSS rescore
  63. 2026-08-17 18:29 UTCEG score recompute
  64. 2026-08-17 17:20 UTCEG score recompute
  65. 2026-08-17 17:19 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Same product

1 shown

npm:@astrojs/vercel

Frequently asked(5)

What is CVE-2026-73424?
CVE-2026-73424 is a medium vulnerability published on August 17, 2026. Astro is a web framework for content-driven websites. From 10.0.3 until 11.0.3, the Astro Vercel adapter in packages/integrations/vercel/src/serverless/entrypoint.ts accepts xastropath for the public /_isr function based only on the x-vercel-isr header, allowing unauthenticated GET requests to…
When was CVE-2026-73424 disclosed?
CVE-2026-73424 was first published on August 17, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73424 actively exploited?
CVE-2026-73424 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (30th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73424?
CVE-2026-73424 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73424?
A fix for CVE-2026-73424 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73424 are linked in the Vendor Advisories panel on this page.

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