CVE-2026-56771

HIGHPre-NVD 8.58.5—
EchelonGraph scoreHIGH confidence

Score 8.5 from GitHub Security Advisory published 2026-06-25. 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
8.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.5Exploit: NoneExposed: 0

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

NewsBlur before version 14.5.0 contains a server-side request forgery vulnerability in the add_url endpoint that allows authenticated users to make arbitrary server requests to internal networks by failing to filter private IP addresses. Attackers can exploit this to access localhost services and cloud metadata endpoints, enabling internal network scanning and sensitive data exfiltration.

CVSS v3
8.5
EG Score
8.5(high)
EPSS
10.4%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 26, 2026

Advisory Details (3)

Auto-updated Jun 25, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

NewsBlur < 14.5.0 - Server-Side Request Forgery via add_url Endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/newsblur-server-side-request-forgery-via-add-url-endpoint
github_commit

commit af742daeca7c (samuelclay/NewsBlur)

Fix landed in samuelclay/NewsBlur commit af742daeca7c — awaiting tagged release

https://github.com/samuelclay/NewsBlur/commit/af742daeca7cc6c8b0d58cbea381e7bc44daa520
github_commit

commit 2e6c6812c94f (samuelclay/NewsBlur)

Fix landed in samuelclay/NewsBlur commit 2e6c6812c94f — awaiting tagged release

https://github.com/samuelclay/NewsBlur/commit/2e6c6812c94f35a731bda864de5aef39f18307f1

Vendor Advisories for CVE-2026-56771(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 40× in last 7d / 63× 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. 2026-07-07 07:31 UTCEG score recompute
  2. 2026-07-07 07:30 UTCGHSA enrichment
  3. 2026-07-06 19:18 UTCEG score recompute
  4. 2026-07-06 19:18 UTCGHSA enrichment
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 07:27 UTCEG score recompute
  8. 2026-07-06 07:27 UTCGHSA enrichment
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 19:38 UTCEG score recompute
  12. 2026-07-05 19:38 UTCGHSA enrichment
  13. 2026-07-05 07:49 UTCEG score recompute
  14. 2026-07-05 07:49 UTCGHSA enrichment
  15. 2026-07-05 02:31 UTCEPSS rescore
  16. 2026-07-05 02:30 UTCEPSS rescore
  17. 2026-07-04 19:58 UTCEG score recompute
  18. 2026-07-04 19:58 UTCGHSA enrichment
  19. 2026-07-04 08:10 UTCEG score recompute
  20. 2026-07-04 08:10 UTCGHSA enrichment
  21. 2026-07-04 06:31 UTCEPSS rescore
  22. 2026-07-04 06:31 UTCEPSS rescore
  23. 2026-07-03 20:19 UTCEG score recompute
  24. 2026-07-03 20:19 UTCGHSA enrichment
  25. 2026-07-03 08:30 UTCEG score recompute
Show 38 more
  1. 2026-07-03 08:30 UTCGHSA enrichment
  2. 2026-07-02 20:41 UTCEG score recompute
  3. 2026-07-02 20:41 UTCGHSA enrichment
  4. 2026-07-02 08:51 UTCEG score recompute
  5. 2026-07-02 08:51 UTCGHSA enrichment
  6. 2026-07-01 21:01 UTCEG score recompute
  7. 2026-07-01 21:00 UTCGHSA enrichment
  8. 2026-07-01 15:07 UTCEPSS rescore
  9. 2026-07-01 09:11 UTCEG score recompute
  10. 2026-07-01 09:11 UTCGHSA enrichment
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 21:22 UTCEG score recompute
  13. 2026-06-30 21:22 UTCGHSA enrichment
  14. 2026-06-30 09:32 UTCEG score recompute
  15. 2026-06-30 09:32 UTCGHSA enrichment
  16. 2026-06-29 21:42 UTCEG score recompute
  17. 2026-06-29 21:42 UTCGHSA enrichment
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-29 09:53 UTCEG score recompute
  20. 2026-06-29 09:53 UTCGHSA enrichment
  21. 2026-06-28 22:04 UTCEG score recompute
  22. 2026-06-28 22:04 UTCGHSA enrichment
  23. 2026-06-28 14:07 UTCEPSS rescore
  24. 2026-06-28 10:14 UTCEG score recompute
  25. 2026-06-28 10:14 UTCGHSA enrichment
  26. 2026-06-28 04:56 UTCEPSS rescore
  27. 2026-06-28 04:56 UTCEPSS rescore
  28. 2026-06-27 22:24 UTCEG score recompute
  29. 2026-06-27 22:24 UTCGHSA enrichment
  30. 2026-06-27 10:35 UTCEG score recompute
  31. 2026-06-27 10:35 UTCGHSA enrichment
  32. 2026-06-27 03:08 UTCEPSS rescore
  33. 2026-06-26 22:46 UTCEG score recompute
  34. 2026-06-26 22:46 UTCGHSA enrichment
  35. 2026-06-26 10:57 UTCEG score recompute
  36. 2026-06-26 10:57 UTCGHSA enrichment
  37. 2026-06-25 19:49 UTCEG score recompute
  38. 2026-06-25 19:49 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-56771?
CVE-2026-56771 is a high vulnerability published on June 25, 2026. NewsBlur before version 14.5.0 contains a server-side request forgery vulnerability in the add_url endpoint that allows authenticated users to make arbitrary server requests to internal networks by failing to filter private IP addresses. Attackers can exploit this to access localhost services and…
When was CVE-2026-56771 disclosed?
CVE-2026-56771 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56771 actively exploited?
CVE-2026-56771 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56771?
CVE-2026-56771 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-56771?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56771, 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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