CVE-2026-25808

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 63% 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, nvd
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Prior to 0.6.20 and 0.7.2, there is a security vulnerability where DMs and followers-only posts were exposed through the ActivityPub outbox endpoint without authorization. This vulnerability is fixed in 0.6.20 and 0.7.2.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

February 9, 2026

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Jun 10, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github.
github Patch Available🟡 PoC Available

DMs get leaked and can be seen on Webfinger Browser · Advisory · fedify-dev/hollo · GitHub

https://github.com/fedify-dev/hollo/security/advisories/GHSA-6r2w-3pcj-v4v5
github_release Patch Available

Hollo 0.7.2

Patch available: fedify-dev/hollo 0.7.2

https://github.com/fedify-dev/hollo/releases/tag/0.7.2
github_release Patch Available

Hollo 0.6.20

Patch available: fedify-dev/hollo 0.6.20

https://github.com/fedify-dev/hollo/releases/tag/0.6.20
github_commit Patch Available

commit 329969c502ef (fedify-dev/hollo)

Patch available: fedify-dev/hollo 0.7.2 (contains commit 329969c502ef)

https://github.com/fedify-dev/hollo/commit/329969c502ef092d5c3f9c2c20421c34f4ff0f0e

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 46× 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 108 total refreshes for this CVE.

  1. 2026-07-30 16:27 UTCEPSS rescore
  2. 2026-07-30 01:30 UTCEPSS rescore
  3. 2026-07-28 15:36 UTCEPSS rescore
  4. 2026-07-26 14:54 UTCEPSS rescore
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  9. 2026-07-23 14:18 UTCEPSS rescore
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  11. 2026-07-23 03:07 UTCEG score recompute
  12. 2026-07-22 14:08 UTCEPSS rescore
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  14. 2026-07-21 15:24 UTCEPSS rescore
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  16. 2026-07-20 17:08 UTCEPSS rescore
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  23. 2026-07-17 17:29 UTCOSV refresh
  24. 2026-07-16 17:03 UTCEPSS rescore
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  1. 2026-07-15 16:57 UTCEPSS rescore
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  22. 2026-07-01 15:06 UTCEPSS rescore
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  24. 2026-06-30 23:22 UTCEPSS rescore
  25. 2026-06-30 23:22 UTCEPSS rescore
  26. 2026-06-29 15:23 UTCOSV refresh
  27. 2026-06-29 14:06 UTCEPSS rescore
  28. 2026-06-28 14:07 UTCEPSS rescore
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  30. 2026-06-28 04:56 UTCEPSS rescore
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  37. 2026-06-23 21:33 UTCEPSS rescore
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  39. 2026-06-22 14:25 UTCEPSS rescore
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  41. 2026-06-21 14:56 UTCEPSS rescore
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  43. 2026-06-21 01:59 UTCEPSS rescore
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  45. 2026-06-19 19:25 UTCEPSS rescore
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  47. 2026-06-18 17:52 UTCEPSS rescore
  48. 2026-06-17 17:53 UTCEPSS rescore
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  50. 2026-06-16 17:52 UTCEPSS rescore
  51. 2026-06-15 17:48 UTCEPSS rescore
  52. 2026-06-14 23:18 UTCEPSS rescore
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  60. 2026-06-08 14:17 UTCEPSS rescore
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  62. 2026-06-07 15:25 UTCEPSS rescore
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  65. 2026-06-06 13:47 UTCEPSS rescore
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  67. 2026-06-05 22:47 UTCEPSS rescore
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  69. 2026-06-05 06:10 UTCEPSS rescore
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  71. 2026-06-04 13:12 UTCEPSS rescore
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  73. 2026-06-02 20:13 UTCEPSS rescore
  74. 2026-06-02 20:13 UTCEPSS rescore
  75. 2026-06-01 13:51 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-25808?
CVE-2026-25808 is a high vulnerability published on February 9, 2026. Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Prior to 0.6.20 and 0.7.2, there is a security vulnerability where DMs and followers-only posts were exposed through the ActivityPub outbox endpoint without authorization. This vulnerability is…
When was CVE-2026-25808 disclosed?
CVE-2026-25808 was first published in the National Vulnerability Database on February 9, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-25808 actively exploited?
CVE-2026-25808 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 63.1% of all scored CVEs.
What is the CVSS score of CVE-2026-25808?
CVE-2026-25808 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-25808?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-25808, 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.

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