CVE-2026-73423

MEDIUMPre-NVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (16th 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
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Astro is a web framework for content-driven websites. From 7.0.0 until 7.0.6, the composable astro/hono pipeline installs security.checkOrigin only through the middleware() primitive, while actions() and pages() can dispatch to user code independently. Mounting actions() before middleware(), as in the examples/advanced-routing example and Cloudflare Hono documentation, allows cross-origin form-encoded action requests to execute before the origin check, and using pages() without middleware() drops the check for on-demand endpoints and pages. The flaw enables blind write-only cross-site request forgery using the victim's cookies against ActionHandler.handle and PagesHandler.handleWithErrorFallback when manifest.checkOrigin is enabled; the attacker can trigger a state-mutating action or endpoint handler but cannot read the cross-origin response. The default non-composable astro() pipeline is not affected. This issue is fixed in version 7.0.6.

CVSS v3
5.1
EG Score
5.1MEDIUMmedium confidence
EG Risk
38
EG Risk 38/100CISA 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
Severity51% × 45%
Exploitation0% × 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
0.3%
EPSS %ILE
16th
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 none (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 12, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Aug 12, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

[email protected]

Patch available: withastro/astro [email protected]

https://github.com/withastro/astro/releases/tag/[email protected]
github_commit Patch Available

commit 0b30b35f8643 (withastro/astro)

Patch available: withastro/astro [email protected] (contains commit 0b30b35f8643)

https://github.com/withastro/astro/commit/0b30b35f864310bee8485c952d1877e82e2b9b1a
github_pr Patch Available

Apply the origin check to Astro Actions regardless of pipeline order

Patch available: withastro/astro [email protected] (PR #17250 merged 2026-07-02)

https://github.com/withastro/astro/pull/17250
githubMentions a patch (unverified)

composable `astro/hono` pipeline bypasses `security.checkOrigin` when `middleware()` is absent or misordered · Advisory · withastro/astro · GitHub

https://github.com/withastro/astro/security/advisories/GHSA-8mv7-9c27-98vc

Vendor Advisories for CVE-2026-73423(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
astro—
  • 7.0.0 up to 7.0.6: fixed in 7.0.6
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 43× 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. 2026-10-06 15:18 UTCEPSS rescore
  5. 2026-10-06 14:08 UTCEG score recompute
  6. 2026-10-05 17:43 UTCEPSS rescore
  7. 2026-10-04 23:22 UTCEPSS rescore
  8. 2026-10-03 19:55 UTCEG score recompute
  9. 2026-10-03 14:26 UTCEPSS rescore
  10. 2026-10-02 08:17 UTCEG score recompute
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-09-30 21:53 UTCEG score recompute
  13. 2026-09-29 15:24 UTCEPSS rescore
  14. 2026-09-29 07:19 UTCEG score recompute
  15. 2026-09-28 08:34 UTCEG score recompute
  16. 2026-09-27 13:48 UTCEPSS rescore
  17. 2026-09-27 09:52 UTCEG score recompute
  18. 2026-09-26 15:59 UTCEPSS rescore
  19. 2026-09-25 04:39 UTCEG score recompute
  20. 2026-09-24 05:56 UTCEG score recompute
  21. 2026-09-23 17:54 UTCEPSS rescore
  22. 2026-09-23 07:14 UTCEG score recompute
  23. 2026-09-22 08:31 UTCEG score recompute
  24. 2026-09-21 21:09 UTCEPSS rescore
  25. 2026-09-21 09:48 UTCEG score recompute
Show 74 more
  1. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 10:11 UTCEG score recompute
  3. 2026-09-19 11:23 UTCEG score recompute
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 10:58 UTCEG score recompute
  6. 2026-09-17 12:15 UTCEG score recompute
  7. 2026-09-16 14:08 UTCEPSS rescore
  8. 2026-09-16 12:50 UTCEG score recompute
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-15 14:08 UTCEG score recompute
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-14 15:26 UTCEG score recompute
  13. 2026-09-12 17:57 UTCEG score recompute
  14. 2026-09-12 15:02 UTCEPSS rescore
  15. 2026-09-11 19:14 UTCEG score recompute
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-10 20:11 UTCEG score recompute
  18. 2026-09-10 09:35 UTCEPSS rescore
  19. 2026-09-09 05:10 UTCEG score recompute
  20. 2026-09-08 22:01 UTCEPSS rescore
  21. 2026-09-07 22:08 UTCEG score recompute
  22. 2026-09-06 23:25 UTCEG score recompute
  23. 2026-09-06 13:48 UTCEPSS rescore
  24. 2026-09-06 00:43 UTCEG score recompute
  25. 2026-09-05 01:58 UTCEG score recompute
  26. 2026-09-04 05:07 UTCEPSS rescore
  27. 2026-09-03 03:56 UTCEG score recompute
  28. 2026-09-02 14:12 UTCEPSS rescore
  29. 2026-09-02 05:14 UTCEG score recompute
  30. 2026-09-01 13:54 UTCEPSS rescore
  31. 2026-09-01 06:22 UTCEG score recompute
  32. 2026-09-01 04:40 UTCEPSS rescore
  33. 2026-09-01 04:40 UTCEPSS rescore
  34. 2026-08-31 05:57 UTCEG score recompute
  35. 2026-08-30 19:18 UTCEPSS rescore
  36. 2026-08-30 19:17 UTCEPSS rescore
  37. 2026-08-30 07:14 UTCEG score recompute
  38. 2026-08-30 01:22 UTCEPSS rescore
  39. 2026-08-29 08:31 UTCEG score recompute
  40. 2026-08-28 21:42 UTCEPSS rescore
  41. 2026-08-27 22:55 UTCEG score recompute
  42. 2026-08-27 14:25 UTCEPSS rescore
  43. 2026-08-27 00:13 UTCEG score recompute
  44. 2026-08-26 14:47 UTCEPSS rescore
  45. 2026-08-26 01:30 UTCEG score recompute
  46. 2026-08-25 13:49 UTCEPSS rescore
  47. 2026-08-25 02:48 UTCEG score recompute
  48. 2026-08-23 05:23 UTCEG score recompute
  49. 2026-08-23 00:19 UTCEPSS rescore
  50. 2026-08-22 06:41 UTCEG score recompute
  51. 2026-08-21 23:49 UTCEPSS rescore
  52. 2026-08-21 07:59 UTCEG score recompute
  53. 2026-08-20 22:56 UTCEPSS rescore
  54. 2026-08-20 09:17 UTCEG score recompute
  55. 2026-08-19 17:04 UTCEPSS rescore
  56. 2026-08-19 10:34 UTCEG score recompute
  57. 2026-08-18 13:49 UTCEPSS rescore
  58. 2026-08-18 13:49 UTCEPSS rescore
  59. 2026-08-18 11:51 UTCEG score recompute
  60. 2026-08-17 13:47 UTCEPSS rescore
  61. 2026-08-17 13:09 UTCEG score recompute
  62. 2026-08-16 14:56 UTCEPSS rescore
  63. 2026-08-16 14:56 UTCEPSS rescore
  64. 2026-08-16 14:26 UTCEG score recompute
  65. 2026-08-16 02:15 UTCEPSS rescore
  66. 2026-08-15 15:44 UTCEG score recompute
  67. 2026-08-15 01:31 UTCEPSS rescore
  68. 2026-08-14 17:01 UTCEG score recompute
  69. 2026-08-13 22:00 UTCEPSS rescore
  70. 2026-08-13 18:19 UTCEG score recompute
  71. 2026-08-13 18:12 UTCEG score recompute
  72. 2026-08-12 21:20 UTCEG score recompute
  73. 2026-08-12 20:41 UTCEG score recompute
  74. 2026-08-12 20:40 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-73423?
CVE-2026-73423 is a medium vulnerability published on August 12, 2026. Astro is a web framework for content-driven websites. From 7.0.0 until 7.0.6, the composable astro/hono pipeline installs security.checkOrigin only through the middleware() primitive, while actions() and pages() can dispatch to user code independently. Mounting actions() before middleware(), as in…
When was CVE-2026-73423 disclosed?
CVE-2026-73423 was first published on August 12, 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-2026-73423 actively exploited?
CVE-2026-73423 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73423?
CVE-2026-73423 has a CVSS base score of 5.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73423?
A fix for CVE-2026-73423 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73423 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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