CVE-2026-75514

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (46th 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
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 5.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

BunkerWeb is an open-source, next-generation Web Application Firewall. Prior to 1.6.13, the blacklist, greylist, and antibot modules in src/common/core/blacklist/blacklist.lua, src/common/core/greylist/greylist.lua, and src/common/core/antibot/antibot.lua trust PTR suffix matches in IGNORE_RDNS, GREYLIST_RDNS, and ANTIBOT_IGNORE_RDNS without using get_ips to confirm that the hostname resolves to the client address. An unauthenticated remote attacker who controls a PTR record can spoof a trusted suffix to bypass rDNS-based blacklisting, gain greylist treatment, or skip an antibot challenge. This issue is fixed in version 1.6.13.

CVSS v3
5.9
EG Score
5.9MEDIUMmedium confidence
EG Risk
27
EG Risk 27/100CISA 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
Severity59% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
46th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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 20, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Aug 20, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v1.6.13

Patch available: bunkerity/bunkerweb v1.6.13

https://github.com/bunkerity/bunkerweb/releases/tag/v1.6.13
github_commit

commit 1a97e5b3f977 (bunkerity/bunkerweb)

Fix landed in bunkerity/bunkerweb commit 1a97e5b3f977 — awaiting tagged release

https://github.com/bunkerity/bunkerweb/commit/1a97e5b3f977130a1b84507a9e1f703c8eec12eb
github_pr

Merge branch "dev" into branch "staging"

Fix merged in bunkerity/bunkerweb PR #3710 on 2026-07-10 — awaiting tagged release

https://github.com/bunkerity/bunkerweb/pull/3710
githubMentions a patch (unverified)🟡 PoC Available

rDNS bypass via missing forward-confirmation (FCrDNS) in blacklist, greylist, whitelist and antibot · Advisory · bunkerity/bunkerweb · GitHub

https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-q54j-5484-pvjm

Weakness Classification(1)

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

Data Freshness Timeline

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

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Frequently asked(5)

What is CVE-2026-75514?
CVE-2026-75514 is a medium vulnerability published on August 20, 2026. BunkerWeb is an open-source, next-generation Web Application Firewall. Prior to 1.6.13, the blacklist, greylist, and antibot modules in src/common/core/blacklist/blacklist.lua, src/common/core/greylist/greylist.lua, and src/common/core/antibot/antibot.lua trust PTR suffix matches in IGNORERDNS,…
When was CVE-2026-75514 disclosed?
CVE-2026-75514 was first published on August 20, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75514 actively exploited?
CVE-2026-75514 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75514?
CVE-2026-75514 has a CVSS base score of 5.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75514?
A fix for CVE-2026-75514 is available: update to the fixed version the vendor names in its advisory.

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