CVE-2026-78145

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-08-24. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

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

A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

August 23, 2026

Last Modified

August 24, 2026

Advisory Details (5)

Auto-updated Aug 23, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github_pr, github_commit.
generic

GitHub - CTFd/CTFd: CTFs as you need them · GitHub

https://github.com/CTFd/CTFd/
github_release Patch Available

3.8.4

Patch available: CTFd/CTFd 3.8.4

https://github.com/CTFd/CTFd/releases/tag/3.8.4
github_commit Patch Available

commit 5d8515842fd1 (CTFd/CTFd)

Patch available: CTFd/CTFd 3.8.4 (contains commit 5d8515842fd1)

https://github.com/CTFd/CTFd/commit/5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9
github_pr Patch Available

Mark 3.8.4

Patch available: CTFd/CTFd 3.8.4 (PR #3026 merged 2026-04-20)

https://github.com/CTFd/CTFd/pull/3026
generic🟡 PoC Available

Open Redirect in CTFd Login and Registration Flow · Michael Blunt

https://mblunt.dev/writeups/ctfd-open-redirect/

Vendor Advisories for CVE-2026-78145(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 28× in last 7d / 28× 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 01:39 UTCEG score recompute
  2. 2026-08-30 01:39 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 00:30 UTCEG score recompute
  5. 2026-08-29 00:29 UTCGHSA enrichment
  6. 2026-08-28 21:42 UTCEPSS rescore
  7. 2026-08-27 21:55 UTCEG score recompute
  8. 2026-08-27 21:55 UTCGHSA enrichment
  9. 2026-08-27 14:25 UTCEPSS rescore
  10. 2026-08-26 20:45 UTCEG score recompute
  11. 2026-08-26 20:45 UTCGHSA enrichment
  12. 2026-08-26 14:47 UTCEPSS rescore
  13. 2026-08-25 19:33 UTCEG score recompute
  14. 2026-08-25 19:33 UTCGHSA enrichment
  15. 2026-08-25 13:49 UTCEPSS rescore
  16. 2026-08-24 18:24 UTCEG score recompute
  17. 2026-08-24 18:24 UTCGHSA enrichment
  18. 2026-08-24 18:21 UTCNVD updateCVSS v4 → 2.1
  19. 2026-08-24 18:16 UTCEG score recompute
  20. 2026-08-24 18:16 UTCGHSA enrichment
  21. 2026-08-24 18:16 UTCMITRE cvelistV5CVSS v4 → 5.3
  22. 2026-08-24 16:47 UTCEG score recompute
  23. 2026-08-24 16:46 UTCGHSA enrichment
  24. 2026-08-24 14:18 UTCEPSS rescore
  25. 2026-08-23 23:32 UTCEG score recompute
Show 3 more
  1. 2026-08-23 23:32 UTCNVD updateCVSS v4 → 2.1
  2. 2026-08-23 22:56 UTCEG score recompute
  3. 2026-08-23 22:55 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78145?
CVE-2026-78145 is a medium vulnerability published on August 23, 2026. A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function issafe_url of the file CTFd/utils/validators/init.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be…
When was CVE-2026-78145 disclosed?
CVE-2026-78145 was first published in the National Vulnerability Database on August 23, 2026, with the most recent update on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78145 actively exploited?
CVE-2026-78145 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 65.1% of all scored CVEs.
What is the CVSS score of CVE-2026-78145?
CVE-2026-78145 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-78145?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78145, 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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