CVE-2026-19264

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM 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: 1.0%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
9.8CRITICALmedium 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
Severity98% × 45%
Exploitation1% × 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
1.0%
EPSS %ILE
61st
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 total (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 7, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Sep 30, 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 25× in last 7d / 153× 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 375 total refreshes for this CVE.

  1. 2026-10-05 08:15 UTCEG score recompute
  2. 2026-10-05 08:15 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 23:12 UTCGHSA enrichment
  5. 2026-10-04 13:24 UTCGHSA enrichment
  6. 2026-10-04 09:31 UTCGHSA enrichment
  7. 2026-10-04 05:44 UTCEG score recompute
  8. 2026-10-04 05:44 UTCGHSA enrichment
  9. 2026-10-03 01:01 UTCEG score recompute
  10. 2026-10-03 01:01 UTCGHSA enrichment
  11. 2026-10-02 16:22 UTCGHSA enrichment
  12. 2026-10-02 16:22 UTCGHSA enrichment
  13. 2026-10-02 09:33 UTCEG score recompute
  14. 2026-10-02 09:33 UTCGHSA enrichment
  15. 2026-10-01 19:49 UTCEPSS rescore
  16. 2026-10-01 14:04 UTCGHSA enrichment
  17. 2026-10-01 10:16 UTCGHSA enrichment
  18. 2026-10-01 06:29 UTCGHSA enrichment
  19. 2026-10-01 02:42 UTCGHSA enrichment
  20. 2026-09-30 22:56 UTCEG score recompute
  21. 2026-09-30 22:56 UTCGHSA enrichment
  22. 2026-09-30 15:02 UTCEPSS rescore
  23. 2026-09-29 15:20 UTCEPSS rescore
  24. 2026-09-29 05:46 UTCEG score recompute
  25. 2026-09-29 05:46 UTCGHSA enrichment
Show 75 more
  1. 2026-09-28 13:51 UTCEPSS rescore
  2. 2026-09-28 10:20 UTCGHSA enrichment
  3. 2026-09-28 06:14 UTCGHSA enrichment
  4. 2026-09-28 02:27 UTCGHSA enrichment
  5. 2026-09-27 17:10 UTCEG score recompute
  6. 2026-09-27 17:10 UTCGHSA enrichment
  7. 2026-09-27 13:47 UTCEPSS rescore
  8. 2026-09-26 15:58 UTCEPSS rescore
  9. 2026-09-25 12:42 UTCGHSA enrichment
  10. 2026-09-25 08:03 UTCGHSA enrichment
  11. 2026-09-25 04:16 UTCEG score recompute
  12. 2026-09-25 04:16 UTCGHSA enrichment
  13. 2026-09-24 12:41 UTCGHSA enrichment
  14. 2026-09-24 08:47 UTCGHSA enrichment
  15. 2026-09-24 05:00 UTCGHSA enrichment
  16. 2026-09-24 01:04 UTCGHSA enrichment
  17. 2026-09-23 21:16 UTCEG score recompute
  18. 2026-09-23 21:16 UTCGHSA enrichment
  19. 2026-09-23 13:47 UTCGHSA enrichment
  20. 2026-09-23 08:46 UTCGHSA enrichment
  21. 2026-09-23 04:59 UTCGHSA enrichment
  22. 2026-09-23 01:12 UTCGHSA enrichment
  23. 2026-09-22 21:19 UTCEG score recompute
  24. 2026-09-22 21:19 UTCGHSA enrichment
  25. 2026-09-22 12:49 UTCGHSA enrichment
  26. 2026-09-22 08:46 UTCGHSA enrichment
  27. 2026-09-22 04:54 UTCGHSA enrichment
  28. 2026-09-22 00:44 UTCEG score recompute
  29. 2026-09-22 00:44 UTCGHSA enrichment
  30. 2026-09-21 12:05 UTCGHSA enrichment
  31. 2026-09-20 20:33 UTCEG score recompute
  32. 2026-09-20 20:33 UTCGHSA enrichment
  33. 2026-09-20 10:55 UTCGHSA enrichment
  34. 2026-09-20 05:07 UTCGHSA enrichment
  35. 2026-09-20 01:11 UTCGHSA enrichment
  36. 2026-09-19 21:24 UTCGHSA enrichment
  37. 2026-09-19 17:30 UTCEG score recompute
  38. 2026-09-19 17:30 UTCGHSA enrichment
  39. 2026-09-19 12:55 UTCGHSA enrichment
  40. 2026-09-19 06:40 UTCGHSA enrichment
  41. 2026-09-19 02:06 UTCGHSA enrichment
  42. 2026-09-18 22:16 UTCEG score recompute
  43. 2026-09-18 22:16 UTCGHSA enrichment
  44. 2026-09-18 19:27 UTCEPSS rescore
  45. 2026-09-18 17:34 UTCGHSA enrichment
  46. 2026-09-18 13:11 UTCGHSA enrichment
  47. 2026-09-18 08:30 UTCGHSA enrichment
  48. 2026-09-18 04:42 UTCGHSA enrichment
  49. 2026-09-18 00:55 UTCEG score recompute
  50. 2026-09-18 00:55 UTCGHSA enrichment
  51. 2026-09-17 15:11 UTCGHSA enrichment
  52. 2026-09-17 08:42 UTCGHSA enrichment
  53. 2026-09-17 04:41 UTCGHSA enrichment
  54. 2026-09-17 00:54 UTCEG score recompute
  55. 2026-09-17 00:54 UTCGHSA enrichment
  56. 2026-09-16 14:07 UTCEPSS rescore
  57. 2026-09-16 11:09 UTCGHSA enrichment
  58. 2026-09-16 06:38 UTCEG score recompute
  59. 2026-09-16 06:38 UTCGHSA enrichment
  60. 2026-09-16 05:14 UTCEPSS rescore
  61. 2026-09-16 02:52 UTCGHSA enrichment
  62. 2026-09-15 14:16 UTCGHSA enrichment
  63. 2026-09-15 06:34 UTCEG score recompute
  64. 2026-09-15 06:34 UTCGHSA enrichment
  65. 2026-09-15 01:00 UTCGHSA enrichment
  66. 2026-09-14 14:44 UTCGHSA enrichment
  67. 2026-09-14 10:57 UTCGHSA enrichment
  68. 2026-09-14 07:11 UTCGHSA enrichment
  69. 2026-09-14 03:24 UTCGHSA enrichment
  70. 2026-09-13 23:37 UTCGHSA enrichment
  71. 2026-09-13 19:50 UTCEG score recompute
  72. 2026-09-13 19:50 UTCGHSA enrichment
  73. 2026-09-13 16:46 UTCEPSS rescore
  74. 2026-09-13 16:03 UTCGHSA enrichment
  75. 2026-09-13 12:16 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 on August 7, 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-2026-19264 actively exploited?
CVE-2026-19264 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (61st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-19264?
CVE-2026-19264 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-19264?
A fix for CVE-2026-19264 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-19264 are linked in the Vendor Advisories panel on this page.

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