CVE-2026-55879

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 81% 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
Trending — 3 sources updated this week
9.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.3Exploit: NoneExposed: 0

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

OpenReplay is a self-hosted session replay suite. From 1.24.0 before 1.25.0, the OpenReplay tracking SDK accepts custom event names and captured page URLs from any visitor using a public project key, stores them in ClickHouse without output encoding, and later renders them in the authenticated dashboard through TextEllipsis and the event-details modal, allowing an unauthenticated attacker to store script that executes in the dashboard origin, reads the session JWT from localStorage, and takes over a dashboard account. This issue is fixed in version 1.25.0.

CVSS v3
9.3
EG Score
9.3(medium)
EPSS
19.3%
KEV
Not listed

Published

July 10, 2026

Last Modified

July 13, 2026

Advisory Details (3)

Auto-updated Jul 10, 2026
Patch available. Sources: github, github_commit, github_release.
github Patch Available

Unauthenticated stored XSS leads to dashboard account takeover · Advisory · openreplay/openreplay · GitHub

https://github.com/openreplay/openreplay/security/advisories/GHSA-3mfc-7hf4-jfxh
github_release Patch Available

v1.25.0

Patch available: openreplay/openreplay v1.25.0

https://github.com/openreplay/openreplay/releases/tag/v1.25.0
github_commit

commit ec41f4425a99 (openreplay/openreplay)

Fix landed in openreplay/openreplay commit ec41f4425a99 — awaiting tagged release

https://github.com/openreplay/openreplay/commit/ec41f4425a99c478a4418adbd2f094ab6a8b0daf

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 39× in last 7d / 39× 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 22:47 UTCEG score recompute
  2. 2026-07-15 18:36 UTCEG score recompute
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 14:23 UTCEG score recompute
  6. 2026-07-15 10:11 UTCEG score recompute
  7. 2026-07-15 05:58 UTCEG score recompute
  8. 2026-07-15 02:00 UTCEPSS rescore
  9. 2026-07-15 02:00 UTCEPSS rescore
  10. 2026-07-15 01:39 UTCEG score recompute
  11. 2026-07-14 21:28 UTCEG score recompute
  12. 2026-07-14 17:17 UTCEG score recompute
  13. 2026-07-14 13:03 UTCEG score recompute
  14. 2026-07-14 08:52 UTCEG score recompute
  15. 2026-07-14 04:39 UTCEG score recompute
  16. 2026-07-14 00:27 UTCEG score recompute
  17. 2026-07-13 22:31 UTCEPSS rescore
  18. 2026-07-13 20:16 UTCEG score recompute
  19. 2026-07-13 16:04 UTCEG score recompute
  20. 2026-07-13 11:51 UTCEG score recompute
  21. 2026-07-13 07:40 UTCEG score recompute
  22. 2026-07-13 06:13 UTCEPSS rescore
  23. 2026-07-13 06:13 UTCEPSS rescore
  24. 2026-07-13 03:29 UTCEG score recompute
  25. 2026-07-12 23:18 UTCEG score recompute
Show 14 more
  1. 2026-07-12 19:07 UTCEG score recompute
  2. 2026-07-12 14:56 UTCEG score recompute
  3. 2026-07-12 10:44 UTCEG score recompute
  4. 2026-07-12 06:33 UTCEG score recompute
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-12 02:22 UTCEG score recompute
  7. 2026-07-11 22:11 UTCEG score recompute
  8. 2026-07-11 18:00 UTCEG score recompute
  9. 2026-07-11 13:49 UTCEG score recompute
  10. 2026-07-11 09:38 UTCEG score recompute
  11. 2026-07-11 05:27 UTCEG score recompute
  12. 2026-07-11 01:16 UTCEG score recompute
  13. 2026-07-10 21:04 UTCEG score recompute
  14. 2026-07-10 21:02 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55879?
CVE-2026-55879 is a critical vulnerability published on July 10, 2026. OpenReplay is a self-hosted session replay suite. From 1.24.0 before 1.25.0, the OpenReplay tracking SDK accepts custom event names and captured page URLs from any visitor using a public project key, stores them in ClickHouse without output encoding, and later renders them in the authenticated…
When was CVE-2026-55879 disclosed?
CVE-2026-55879 was first published in the National Vulnerability Database on July 10, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55879 actively exploited?
CVE-2026-55879 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55879?
CVE-2026-55879 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-55879?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55879, 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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