CVE-2026-42298

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.8% (56th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Postiz is an AI social media scheduling tool. Prior to commit da44801, a "Pwn Request" vulnerability in the Build and Publish PR Docker Image workflow (.github/workflows/pr-docker-build.yml) allows any unauthenticated user to execute arbitrary code during the Docker build process and exfiltrate a highly privileged GITHUB_TOKEN (write-all permissions). This can be achieved simply by opening a Pull Request from a fork with a maliciously modified Dockerfile.dev. This issue has been patched via commit da44801.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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 (value × EchelonGraph’s weight)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation0.8% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
0.8%
EPSS %ILE
56th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 8, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated Oct 10, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Arbitrary Code Execution and Token Exfiltration in pr-docker-build.yml via untrusted Dockerfile.dev · Advisory · gitroomhq/postiz-app · GitHub

https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-v975-9h5p-xhm4
GitHub commit Patch Available

commit da448012dd87 (gitroomhq/postiz-app)

Patch available: gitroomhq/postiz-app v2.21.7 (contains commit da448012dd87)

https://github.com/gitroomhq/postiz-app/commit/da448012dd87e94944cbe83a38e7fd023269ec46

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 31× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 183 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 84 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 19:13 UTCEG score recompute
  2. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  3. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  4. 2026-10-15 16:24 UTCEG score recompute
  5. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  6. 2026-10-14 10:36 UTCEG score recompute
  7. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  8. 2026-10-13 09:05 UTCEG score recompute
  9. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  10. 2026-10-12 16:07 UTCEG score recompute
  11. 2026-10-11 19:49 UTCEG score recompute
  12. 2026-10-11 17:03 UTCEG score recompute
  13. 2026-10-11 14:29 UTCEG score recompute
  14. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  15. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  16. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  17. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  19. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  22. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  23. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  24. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  25. 2026-09-30 07:58 UTCOSV refresh
Show 74 more
  1. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  2. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  3. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  6. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  7. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  8. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  9. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  12. 2026-09-11 13:53 UTCOSV refresh
  13. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  17. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  19. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  20. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  22. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  24. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  25. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  26. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  27. 2026-08-23 18:54 UTCEG score recompute
  28. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  29. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  30. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  31. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  32. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  33. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  34. 2026-08-17 11:28 UTCEG score recompute
  35. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  36. 2026-08-16 04:32 UTCEG score recompute
  37. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  38. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  39. 2026-08-14 03:06 UTCEG score recompute
  40. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  41. 2026-08-12 16:42 UTCEG score recompute
  42. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  43. 2026-08-11 15:50 UTCEG score recompute
  44. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  45. 2026-08-11 01:15 UTCEG score recompute
  46. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  47. 2026-08-09 14:26 UTCEG score recompute
  48. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  49. 2026-08-09 02:22 UTCEG score recompute
  50. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  51. 2026-08-07 20:09 UTCEG score recompute
  52. 2026-08-06 16:51 UTCEG score recompute
  53. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  54. 2026-08-05 22:06 UTCEG score recompute
  55. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  56. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  57. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  58. 2026-08-03 19:29 UTCEG score recompute
  59. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  60. 2026-08-02 02:39 UTCEG score recompute
  61. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  62. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  63. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  64. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  65. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  66. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  67. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  68. 2026-07-26 08:29 UTCEG score recompute▼ 0.20
  69. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  70. 2026-07-24 22:12 UTCNVD updateCVSS v3 → 9.8
  71. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  72. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  73. 2026-07-23 03:11 UTCEG score recompute
  74. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.5% · 40th percentile

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Frequently asked(5)

What is CVE-2026-42298?
CVE-2026-42298 is a critical-severity vulnerability; its CVE record was published on May 8, 2026. Postiz is an AI social media scheduling tool. Prior to commit da44801, a "Pwn Request" vulnerability in the Build and Publish PR Docker Image workflow (.github/workflows/pr-docker-build.yml) allows any unauthenticated user to execute arbitrary code during the Docker build process and exfiltrate a…
When was the CVE record for CVE-2026-42298 published?
The CVE record for CVE-2026-42298 was published on May 8, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 24, 2026; the record at its source may have been updated since.
Is CVE-2026-42298 actively exploited?
CVE-2026-42298 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42298?
CVE-2026-42298 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-42298?
A fix for CVE-2026-42298 is available: update to the fixed version the vendor names in its advisory.

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