CVE-2026-19264

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-07. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

August 7, 2026

Last Modified

August 7, 2026

Advisory Details (3)

Auto-updated Aug 14, 2026
Patch available. Sources: github_commit, github_release.
github_release Patch Available

v2.22.1

Patch available: gitroomhq/postiz-app v2.22.1

https://github.com/gitroomhq/postiz-app/releases/tag/v2.22.1
github_commit Patch Available

commit 7936062 (gitroomhq/postiz-app)

Patch available: gitroomhq/postiz-app v2.22.1 (contains commit 7936062)

https://github.com/gitroomhq/postiz-app/commit/7936062
generic

PSA-2026-TH12B7: Unauthenticated arbitrary file read via /uploads path traversal (URL-encoded separators) leading to instance takeover · GAdvisory

https://gadvisory.org/advisories/PSA-2026-TH12B7

Vendor Advisories for CVE-2026-19264(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 58× in last 7d / 118× 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.

Showing the most recent 100 of 118 total refreshes for this CVE.

  1. 2026-08-21 06:35 UTCGHSA enrichment
  2. 2026-08-21 02:48 UTCGHSA enrichment
  3. 2026-08-20 23:00 UTCEG score recompute
  4. 2026-08-20 23:00 UTCGHSA enrichment
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 19:13 UTCGHSA enrichment
  7. 2026-08-20 15:27 UTCGHSA enrichment
  8. 2026-08-20 11:39 UTCGHSA enrichment
  9. 2026-08-20 07:52 UTCGHSA enrichment
  10. 2026-08-20 04:05 UTCGHSA enrichment
  11. 2026-08-20 00:17 UTCGHSA enrichment
  12. 2026-08-19 20:30 UTCEG score recompute
  13. 2026-08-19 20:30 UTCGHSA enrichment
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-19 16:42 UTCGHSA enrichment
  16. 2026-08-19 12:53 UTCGHSA enrichment
  17. 2026-08-19 09:07 UTCGHSA enrichment
  18. 2026-08-19 05:20 UTCGHSA enrichment
  19. 2026-08-19 01:28 UTCGHSA enrichment
  20. 2026-08-18 21:41 UTCGHSA enrichment
  21. 2026-08-18 17:51 UTCEG score recompute
  22. 2026-08-18 17:51 UTCGHSA enrichment
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-18 12:47 UTCGHSA enrichment
  25. 2026-08-18 08:33 UTCGHSA enrichment
Show 75 more
  1. 2026-08-18 04:43 UTCGHSA enrichment
  2. 2026-08-18 00:56 UTCGHSA enrichment
  3. 2026-08-17 20:52 UTCGHSA enrichment
  4. 2026-08-17 17:05 UTCEG score recompute
  5. 2026-08-17 17:05 UTCGHSA enrichment
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 13:17 UTCGHSA enrichment
  8. 2026-08-17 09:31 UTCGHSA enrichment
  9. 2026-08-17 05:44 UTCGHSA enrichment
  10. 2026-08-17 01:44 UTCGHSA enrichment
  11. 2026-08-16 21:57 UTCGHSA enrichment
  12. 2026-08-16 18:10 UTCEG score recompute
  13. 2026-08-16 18:10 UTCGHSA enrichment
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 14:23 UTCGHSA enrichment
  16. 2026-08-16 10:36 UTCGHSA enrichment
  17. 2026-08-16 06:49 UTCGHSA enrichment
  18. 2026-08-16 03:03 UTCEG score recompute
  19. 2026-08-16 03:03 UTCGHSA enrichment
  20. 2026-08-16 02:14 UTCEPSS rescore
  21. 2026-08-15 23:16 UTCGHSA enrichment
  22. 2026-08-15 19:29 UTCGHSA enrichment
  23. 2026-08-15 15:42 UTCGHSA enrichment
  24. 2026-08-15 11:55 UTCGHSA enrichment
  25. 2026-08-15 08:08 UTCGHSA enrichment
  26. 2026-08-15 04:21 UTCEG score recompute
  27. 2026-08-15 04:21 UTCGHSA enrichment
  28. 2026-08-15 01:30 UTCEPSS rescore
  29. 2026-08-15 00:33 UTCGHSA enrichment
  30. 2026-08-14 20:46 UTCGHSA enrichment
  31. 2026-08-14 17:00 UTCGHSA enrichment
  32. 2026-08-14 13:13 UTCGHSA enrichment
  33. 2026-08-14 09:27 UTCGHSA enrichment
  34. 2026-08-14 05:40 UTCGHSA enrichment
  35. 2026-08-14 01:54 UTCGHSA enrichment
  36. 2026-08-13 22:07 UTCEG score recompute
  37. 2026-08-13 22:07 UTCGHSA enrichment
  38. 2026-08-13 22:00 UTCEPSS rescore
  39. 2026-08-13 18:20 UTCGHSA enrichment
  40. 2026-08-13 14:32 UTCGHSA enrichment
  41. 2026-08-13 10:45 UTCGHSA enrichment
  42. 2026-08-13 06:59 UTCGHSA enrichment
  43. 2026-08-13 03:09 UTCGHSA enrichment
  44. 2026-08-12 23:22 UTCGHSA enrichment
  45. 2026-08-12 19:35 UTCGHSA enrichment
  46. 2026-08-12 15:49 UTCEG score recompute
  47. 2026-08-12 15:49 UTCGHSA enrichment
  48. 2026-08-12 13:50 UTCEPSS rescore
  49. 2026-08-12 12:02 UTCGHSA enrichment
  50. 2026-08-12 08:15 UTCGHSA enrichment
  51. 2026-08-12 04:28 UTCGHSA enrichment
  52. 2026-08-12 00:32 UTCGHSA enrichment
  53. 2026-08-11 20:46 UTCGHSA enrichment
  54. 2026-08-11 16:59 UTCEG score recompute
  55. 2026-08-11 16:59 UTCGHSA enrichment
  56. 2026-08-11 13:42 UTCEPSS rescore
  57. 2026-08-11 13:12 UTCGHSA enrichment
  58. 2026-08-11 09:25 UTCGHSA enrichment
  59. 2026-08-11 05:38 UTCGHSA enrichment
  60. 2026-08-11 01:51 UTCEG score recompute
  61. 2026-08-11 01:51 UTCGHSA enrichment
  62. 2026-08-11 00:00 UTCEPSS rescore
  63. 2026-08-10 22:05 UTCGHSA enrichment
  64. 2026-08-10 18:18 UTCGHSA enrichment
  65. 2026-08-10 14:31 UTCGHSA enrichment
  66. 2026-08-10 10:42 UTCGHSA enrichment
  67. 2026-08-10 06:55 UTCGHSA enrichment
  68. 2026-08-10 03:08 UTCGHSA enrichment
  69. 2026-08-09 23:21 UTCGHSA enrichment
  70. 2026-08-09 19:34 UTCGHSA enrichment
  71. 2026-08-09 15:47 UTCEG score recompute
  72. 2026-08-09 15:47 UTCGHSA enrichment
  73. 2026-08-09 13:46 UTCEPSS rescore
  74. 2026-08-09 12:01 UTCGHSA enrichment
  75. 2026-08-09 08:14 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-19264?
CVE-2026-19264 is a critical vulnerability published on August 7, 2026. Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw…
When was CVE-2026-19264 disclosed?
CVE-2026-19264 was first published in the National Vulnerability Database on August 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19264 actively exploited?
CVE-2026-19264 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.4% of all scored CVEs.
What is the CVSS score of CVE-2026-19264?
CVE-2026-19264 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-19264?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19264, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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