CVE-2026-57511

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-07-28. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

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

SuperPlane before 0.30.0 contains an SMTP header injection vulnerability that allows unauthenticated attackers to inject arbitrary SMTP headers by including CRLF sequences in the event payload title field delivered via webhook. Attackers can manipulate the unsanitized title field passed to the SMTP DATA command to add Bcc recipients for content exfiltration, forge the From address to bypass SPF and DKIM checks, or inject Content-Type and MIME boundary headers to corrupt message bodies for phishing.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 30, 2026

Advisory Details (3)

Auto-updated Jul 28, 2026
Patch available. Sources: github_release, github_pr.
generic

SuperPlane < 0.30.0 SMTP Header Injection via Webhook Event Title | Advisories | VulnCheck

https://www.vulncheck.com/advisories/superplane-smtp-header-injection-via-webhook-event-title
github_pr

fix: enforce organization scoping on CanvasService handlers

Fix merged in superplanehq/superplane PR #6354 on 2026-07-25 — awaiting tagged release

https://github.com/superplanehq/superplane/pull/6354
github_release Patch Available

v0.30.0

Patch available: superplanehq/superplane v0.30.0

https://github.com/superplanehq/superplane/releases/tag/v0.30.0

Vendor Advisories for CVE-2026-57511(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 17× in last 7d / 80× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 23:30 UTCEG score recompute
  3. 2026-08-29 23:30 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 20:57 UTCEG score recompute
  6. 2026-08-27 20:57 UTCGHSA enrichment
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 19:41 UTCEG score recompute
  9. 2026-08-26 19:41 UTCGHSA enrichment
  10. 2026-08-26 14:46 UTCEPSS rescore
  11. 2026-08-25 18:41 UTCEG score recompute
  12. 2026-08-25 18:40 UTCGHSA enrichment
  13. 2026-08-25 13:49 UTCEPSS rescore
  14. 2026-08-24 18:51 UTCEG score recompute
  15. 2026-08-24 18:50 UTCGHSA enrichment
  16. 2026-08-23 19:02 UTCEG score recompute
  17. 2026-08-23 19:02 UTCGHSA enrichment
  18. 2026-08-23 00:19 UTCEPSS rescore
  19. 2026-08-22 19:13 UTCEG score recompute
  20. 2026-08-22 19:13 UTCGHSA enrichment
  21. 2026-08-21 23:49 UTCEPSS rescore
  22. 2026-08-21 19:25 UTCEG score recompute
  23. 2026-08-21 19:25 UTCGHSA enrichment
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-20 19:34 UTCGHSA enrichment
Show 69 more
  1. 2026-08-19 19:46 UTCEG score recompute
  2. 2026-08-19 19:46 UTCGHSA enrichment
  3. 2026-08-19 17:04 UTCEPSS rescore
  4. 2026-08-18 18:38 UTCEG score recompute
  5. 2026-08-18 18:38 UTCGHSA enrichment
  6. 2026-08-18 13:48 UTCEPSS rescore
  7. 2026-08-17 17:12 UTCEG score recompute
  8. 2026-08-17 17:11 UTCGHSA enrichment
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-16 17:22 UTCEG score recompute
  11. 2026-08-16 17:22 UTCGHSA enrichment
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 02:14 UTCEPSS rescore
  14. 2026-08-15 17:34 UTCEG score recompute
  15. 2026-08-15 17:34 UTCGHSA enrichment
  16. 2026-08-15 01:30 UTCEPSS rescore
  17. 2026-08-14 17:46 UTCEG score recompute
  18. 2026-08-14 17:46 UTCGHSA enrichment
  19. 2026-08-13 22:00 UTCEPSS rescore
  20. 2026-08-13 17:55 UTCGHSA enrichment
  21. 2026-08-12 18:07 UTCEG score recompute
  22. 2026-08-12 18:07 UTCGHSA enrichment
  23. 2026-08-12 13:51 UTCEPSS rescore
  24. 2026-08-11 18:19 UTCEG score recompute
  25. 2026-08-11 18:19 UTCGHSA enrichment
  26. 2026-08-11 00:00 UTCEPSS rescore
  27. 2026-08-10 18:31 UTCGHSA enrichment
  28. 2026-08-09 18:43 UTCEG score recompute
  29. 2026-08-09 18:43 UTCGHSA enrichment
  30. 2026-08-09 13:46 UTCEPSS rescore
  31. 2026-08-08 18:56 UTCEG score recompute
  32. 2026-08-08 18:56 UTCGHSA enrichment
  33. 2026-08-08 16:37 UTCEPSS rescore
  34. 2026-08-07 19:08 UTCEG score recompute
  35. 2026-08-07 19:08 UTCGHSA enrichment
  36. 2026-08-06 19:20 UTCEG score recompute
  37. 2026-08-06 19:20 UTCGHSA enrichment
  38. 2026-08-06 13:47 UTCEPSS rescore
  39. 2026-08-05 19:32 UTCEG score recompute
  40. 2026-08-05 19:32 UTCGHSA enrichment
  41. 2026-08-05 19:17 UTCEPSS rescore
  42. 2026-08-04 19:43 UTCEG score recompute
  43. 2026-08-04 19:43 UTCGHSA enrichment
  44. 2026-08-04 15:10 UTCEPSS rescore
  45. 2026-08-04 10:39 UTCEPSS rescore
  46. 2026-08-03 19:55 UTCEG score recompute
  47. 2026-08-03 19:55 UTCGHSA enrichment
  48. 2026-08-03 10:36 UTCEPSS rescore
  49. 2026-08-02 20:07 UTCEG score recompute
  50. 2026-08-02 20:07 UTCGHSA enrichment
  51. 2026-08-02 02:27 UTCEPSS rescore
  52. 2026-08-01 20:19 UTCEG score recompute
  53. 2026-08-01 20:19 UTCGHSA enrichment
  54. 2026-08-01 04:16 UTCEPSS rescore
  55. 2026-07-31 20:31 UTCGHSA enrichment
  56. 2026-07-30 20:43 UTCEG score recompute
  57. 2026-07-30 20:42 UTCGHSA enrichment
  58. 2026-07-30 16:28 UTCEPSS rescore
  59. 2026-07-30 16:14 UTCEG score recompute
  60. 2026-07-30 16:14 UTCGHSA enrichment
  61. 2026-07-30 01:30 UTCEPSS rescore
  62. 2026-07-30 01:30 UTCEPSS rescore
  63. 2026-07-29 16:25 UTCEG score recompute
  64. 2026-07-29 16:25 UTCGHSA enrichment
  65. 2026-07-29 15:34 UTCEG score recompute
  66. 2026-07-29 15:34 UTCGHSA enrichment
  67. 2026-07-28 20:26 UTCEG score recompute
  68. 2026-07-28 19:28 UTCEG score recompute
  69. 2026-07-28 19:27 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-57511?
CVE-2026-57511 is a medium vulnerability published on July 28, 2026. SuperPlane before 0.30.0 contains an SMTP header injection vulnerability that allows unauthenticated attackers to inject arbitrary SMTP headers by including CRLF sequences in the event payload title field delivered via webhook. Attackers can manipulate the unsanitized title field passed to the SMTP…
When was CVE-2026-57511 disclosed?
CVE-2026-57511 was first published in the National Vulnerability Database on July 28, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57511 actively exploited?
CVE-2026-57511 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 85.7% of all scored CVEs.
What is the CVSS score of CVE-2026-57511?
CVE-2026-57511 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-57511?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57511, 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.

Dependency Blast Radius

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