CVE-2026-71271

HIGHPre-NVD 8.58.5—
EchelonGraph scoreHIGH confidence

Score 8.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. a secondary CVSS source baseline 8.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.5Exploit: None knownExposed: 0

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

Memos' webhook URL validation, isReservedIP (internal/webhook/validate.go), checks a candidate IP against a reservedCIDRs list that omits 0.0.0.0/8 and never calls ip.IsUnspecified — unlike the correctly implemented sibling function isInternalIP in internal/httpgetter/html_meta.go, which does.

CVSS v3
8.5
EG Score
8.5(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity85% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

memos/internal/webhook/validate.go at main · usememos/memos · GitHub

https://github.com/usememos/memos/blob/main/internal/webhook/validate.go
generic

GitHub - usememos/memos: Open-source, self-hosted note-taking tool built for quick capture. Markdown-native, lightweight, and fully yours. · GitHub

https://github.com/usememos/memos

Vendor Advisories for CVE-2026-71271(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 30× in last 7d / 68× 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. 2026-08-20 11:17 UTCGHSA enrichment
  2. 2026-08-19 22:46 UTCEG score recompute
  3. 2026-08-19 22:46 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 10:14 UTCGHSA enrichment
  6. 2026-08-18 21:43 UTCEG score recompute
  7. 2026-08-18 21:43 UTCGHSA enrichment
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-18 08:39 UTCGHSA enrichment
  11. 2026-08-17 19:53 UTCEG score recompute
  12. 2026-08-17 19:53 UTCGHSA enrichment
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-17 07:21 UTCGHSA enrichment
  15. 2026-08-16 18:50 UTCEG score recompute
  16. 2026-08-16 18:50 UTCGHSA enrichment
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 06:13 UTCEG score recompute
  20. 2026-08-16 06:13 UTCGHSA enrichment
  21. 2026-08-16 02:15 UTCEPSS rescore
  22. 2026-08-15 17:42 UTCGHSA enrichment
  23. 2026-08-15 05:10 UTCEG score recompute
  24. 2026-08-15 05:10 UTCGHSA enrichment
  25. 2026-08-15 01:31 UTCEPSS rescore
Show 43 more
  1. 2026-08-14 16:38 UTCGHSA enrichment
  2. 2026-08-14 04:07 UTCEG score recompute
  3. 2026-08-14 04:07 UTCGHSA enrichment
  4. 2026-08-13 22:00 UTCEPSS rescore
  5. 2026-08-13 15:35 UTCGHSA enrichment
  6. 2026-08-13 03:04 UTCGHSA enrichment
  7. 2026-08-12 14:32 UTCEG score recompute
  8. 2026-08-12 14:32 UTCGHSA enrichment
  9. 2026-08-12 13:51 UTCEPSS rescore
  10. 2026-08-12 02:00 UTCEG score recompute
  11. 2026-08-12 02:00 UTCGHSA enrichment
  12. 2026-08-11 13:28 UTCGHSA enrichment
  13. 2026-08-11 00:56 UTCEG score recompute
  14. 2026-08-11 00:56 UTCGHSA enrichment
  15. 2026-08-11 00:00 UTCEPSS rescore
  16. 2026-08-10 12:24 UTCEG score recompute
  17. 2026-08-10 12:24 UTCGHSA enrichment
  18. 2026-08-10 11:42 UTCGHSA enrichment
  19. 2026-08-10 11:22 UTCEG score recompute
  20. 2026-08-10 11:22 UTCGHSA enrichment
  21. 2026-08-10 09:16 UTCGHSA enrichment
  22. 2026-08-09 20:45 UTCEG score recompute
  23. 2026-08-09 20:45 UTCGHSA enrichment
  24. 2026-08-09 13:47 UTCEPSS rescore
  25. 2026-08-09 08:13 UTCGHSA enrichment
  26. 2026-08-08 19:42 UTCEG score recompute
  27. 2026-08-08 19:42 UTCGHSA enrichment
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-08 07:10 UTCGHSA enrichment
  30. 2026-08-07 18:38 UTCEG score recompute
  31. 2026-08-07 18:38 UTCGHSA enrichment
  32. 2026-08-07 06:06 UTCGHSA enrichment
  33. 2026-08-06 17:34 UTCEG score recompute
  34. 2026-08-06 17:34 UTCGHSA enrichment
  35. 2026-08-06 13:47 UTCEPSS rescore
  36. 2026-08-06 05:02 UTCGHSA enrichment
  37. 2026-08-05 16:30 UTCEG score recompute
  38. 2026-08-05 16:30 UTCGHSA enrichment
  39. 2026-08-05 16:13 UTCEG score recompute
  40. 2026-08-05 16:13 UTCGHSA enrichment
  41. 2026-08-05 13:28 UTCEG score recompute
  42. 2026-08-05 13:08 UTCEG score recompute
  43. 2026-08-05 13:07 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-71271?
CVE-2026-71271 is a high vulnerability published on August 5, 2026. Memos' webhook URL validation, isReservedIP (internal/webhook/validate.go), checks a candidate IP against a reservedCIDRs list that omits 0.0.0.0/8 and never calls ip.IsUnspecified — unlike the correctly implemented sibling function isInternalIP in internal/httpgetter/html_meta.go, which does.
When was CVE-2026-71271 disclosed?
CVE-2026-71271 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71271 actively exploited?
CVE-2026-71271 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 84.7% of all scored CVEs.
What is the CVSS score of CVE-2026-71271?
CVE-2026-71271 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-71271?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71271, 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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