CVE-2026-45788

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.5%, 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
Trending — 4 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, secure uploads could be exposed by pull_hotlinked_images when an attacker knew the secured upload URL and the secure_uploads site setting was enabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
37.3%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Jul 9, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Secure uploads exposed by hotlinked image copying · Advisory · discourse/discourse · GitHub

https://github.com/discourse/discourse/security/advisories/GHSA-3876-w96v-8v38
github_commit

commit fa74e0dec734 (discourse/discourse)

Fix landed in discourse/discourse commit fa74e0dec734 — awaiting tagged release

https://github.com/discourse/discourse/commit/fa74e0dec7341a858ab83a1977fa52629bced1aa
github_commit

commit eff53af26367 (discourse/discourse)

Fix landed in discourse/discourse commit eff53af26367 — awaiting tagged release

https://github.com/discourse/discourse/commit/eff53af26367ae0dcb3a426954d233e8c7449f95
github_commit

commit 8b4a959b251a (discourse/discourse)

Fix landed in discourse/discourse commit 8b4a959b251a — awaiting tagged release

https://github.com/discourse/discourse/commit/8b4a959b251a856a9c911fb9f2ac34fbc31a7471
github_commit

commit 5807c426880e (discourse/discourse)

Fix landed in discourse/discourse commit 5807c426880e — awaiting tagged release

https://github.com/discourse/discourse/commit/5807c426880eadf248006e851604fc9284327ce5

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 15× 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. 2026-07-15 21:06 UTCEG score recompute
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 10:07 UTCEG score recompute▲ 1.20
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-14 21:22 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  6. 2026-07-14 07:45 UTCEG score recompute
  7. 2026-07-13 22:30 UTCEPSS rescore
  8. 2026-07-13 06:13 UTCEPSS rescore
  9. 2026-07-13 05:19 UTCEG score recompute
  10. 2026-07-12 05:46 UTCEPSS rescore
  11. 2026-07-12 02:57 UTCEG score recompute
  12. 2026-07-11 08:27 UTCEPSS rescore
  13. 2026-07-11 00:35 UTCEG score recompute
  14. 2026-07-09 22:10 UTCEG score recompute
  15. 2026-07-09 22:10 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45788?
CVE-2026-45788 is a high vulnerability published on July 9, 2026. Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, secure uploads could be exposed by pullhotlinkedimages when an attacker knew the secured upload URL and the secure_uploads site setting was enabled. This issue is fixed in versions 2026.6.0,…
When was CVE-2026-45788 disclosed?
CVE-2026-45788 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45788 actively exploited?
CVE-2026-45788 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45788?
CVE-2026-45788 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-45788?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45788, 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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