CVE-2026-52780

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 86% 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, secondary
9.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.6Exploit: NoneExposed: 0

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

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, cache store poisoning leads to Remote Code Execution (RCE). This vulnerability is fixed in 17.3.3 and 17.4.1.

CVSS v3
9.6
EG Score
9.6(medium)
EPSS
14.1%
KEV
Not listed

Published

June 26, 2026

Last Modified

June 27, 2026

Advisory Details (1)

Auto-updated Jun 26, 2026
Patch available. Sources: github.
github Patch Available

Cache store poisoning leads to Remote Code Execution (RCE) · Advisory · opf/openproject · GitHub

https://github.com/opf/openproject/security/advisories/GHSA-qj96-f42f-6336

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 52× in last 7d / 140× 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 140 total refreshes for this CVE.

  1. 2026-07-16 02:21 UTCEG score recompute
  2. 2026-07-15 22:12 UTCEG score recompute
  3. 2026-07-15 17:53 UTCEG score recompute
  4. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-07-12 22:14 UTCEG score recompute
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  12. 2026-07-11 08:27 UTCEPSS rescore
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  22. 2026-07-09 19:10 UTCEPSS rescore
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  24. 2026-07-09 18:49 UTCEG score recompute
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  31. 2026-07-08 15:16 UTCEPSS rescore
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  33. 2026-07-08 13:34 UTCEG score recompute
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  39. 2026-07-07 13:46 UTCEPSS rescore
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  41. 2026-07-07 12:35 UTCEG score recompute
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  45. 2026-07-06 19:50 UTCEG score recompute
  46. 2026-07-06 16:27 UTCEPSS rescore
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  48. 2026-07-06 15:39 UTCEG score recompute
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  59. 2026-07-05 01:51 UTCEG score recompute
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  73. 2026-07-02 19:33 UTCEG score recompute
  74. 2026-07-02 15:23 UTCEG score recompute
  75. 2026-07-02 11:13 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-52780?
CVE-2026-52780 is a critical vulnerability published on June 26, 2026. OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, cache store poisoning leads to Remote Code Execution (RCE). This vulnerability is fixed in 17.3.3 and 17.4.1.
When was CVE-2026-52780 disclosed?
CVE-2026-52780 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on June 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52780 actively exploited?
CVE-2026-52780 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-52780?
CVE-2026-52780 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-52780?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52780, 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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