CVE-2026-59825

HIGHPre-NVD 7.47.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 73% of all CVEs by exploit prediction. 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
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.4Exploit: None knownExposed: 0

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

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.19 and from 4.5.0 until 4.5.12, Mastodon's app/models/concerns/user/ldap_authenticable.rb mutates OpenSSL::SSL::SSLContext::DEFAULT_PARAMS when LDAP authentication uses LDAP_TLS_NO_VERIFY=true, disabling SSL and TLS certificate verification globally for requests made by puma web processes while sidekiq background jobs remain unaffected. This issue is fixed in versions 4.4.19 and 4.5.12.

CVSS v3
7.4
EG Score
7.4(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: 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
Severity74% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 18, 2026

Advisory Details (7)

Auto-updated Aug 18, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available

Unwanted deactivation of SSL/TLS certificate verification · Advisory · mastodon/mastodon · GitHub

Affected: version 4.4.19 and 4.5.12 respectively.

https://github.com/mastodon/mastodon/security/advisories/GHSA-3rhr-8phh-jm86
github_release Patch Available

v4.5.12

Patch available: mastodon/mastodon v4.5.12

https://github.com/mastodon/mastodon/releases/tag/v4.5.12
github_release Patch Available

v4.4.19

Patch available: mastodon/mastodon v4.4.19

https://github.com/mastodon/mastodon/releases/tag/v4.4.19
github_pr

LDAP: Fix attempted modification of frozen hash

Fix merged in mastodon/mastodon PR #39571 on 2026-06-23 — awaiting tagged release

https://github.com/mastodon/mastodon/pull/39571
github_commit

commit 761c61b42590 (mastodon/mastodon)

Fix landed in mastodon/mastodon commit 761c61b42590 — awaiting tagged release

https://github.com/mastodon/mastodon/commit/761c61b42590a2fd91442fc15a0a7583e48bbea4
github_commit

commit 5748d0b16ea0 (mastodon/mastodon)

Fix landed in mastodon/mastodon commit 5748d0b16ea0 — awaiting tagged release

https://github.com/mastodon/mastodon/commit/5748d0b16ea09001e0933f76c7afe814e09652ef
github_commit

commit 2ccb6ef277e7 (mastodon/mastodon)

Fix landed in mastodon/mastodon commit 2ccb6ef277e7 — awaiting tagged release

https://github.com/mastodon/mastodon/commit/2ccb6ef277e725d1932295690cf8ab9d3dc03149

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 25× 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 02:54 UTCEG score recompute
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-29 03:58 UTCEG score recompute
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 19:24 UTCEG score recompute
  6. 2026-08-27 14:25 UTCEPSS rescore
  7. 2026-08-26 19:34 UTCEG score recompute
  8. 2026-08-26 14:46 UTCEPSS rescore
  9. 2026-08-25 20:39 UTCEG score recompute
  10. 2026-08-25 13:49 UTCEPSS rescore
  11. 2026-08-24 21:36 UTCEG score recompute
  12. 2026-08-24 10:10 UTCEG score recompute
  13. 2026-08-23 11:13 UTCEG score recompute
  14. 2026-08-23 00:19 UTCEPSS rescore
  15. 2026-08-22 00:54 UTCEG score recompute
  16. 2026-08-21 23:49 UTCEPSS rescore
  17. 2026-08-21 01:54 UTCEG score recompute
  18. 2026-08-20 22:55 UTCEPSS rescore
  19. 2026-08-20 02:59 UTCEG score recompute
  20. 2026-08-19 17:04 UTCEPSS rescore
  21. 2026-08-18 16:34 UTCEG score recompute
  22. 2026-08-18 15:59 UTCEG score recompute
  23. 2026-08-18 15:19 UTCEG score recompute
  24. 2026-08-18 15:14 UTCEG score recompute
  25. 2026-08-18 15:14 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59825?
CVE-2026-59825 is a high vulnerability published on August 18, 2026. Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.19 and from 4.5.0 until 4.5.12, Mastodon's app/models/concerns/user/ldapauthenticable.rb mutates OpenSSL::SSL::SSLContext::DEFAULTPARAMS when LDAP authentication uses LDAPTLSNO_VERIFY=true, disabling SSL and…
When was CVE-2026-59825 disclosed?
CVE-2026-59825 was first published in the National Vulnerability Database on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59825 actively exploited?
CVE-2026-59825 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 72.6% of all scored CVEs.
What is the CVSS score of CVE-2026-59825?
CVE-2026-59825 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2026-59825?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59825, 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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