CVE-2026-55881

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 64% 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
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 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 1.22.0 before 1.27.0, getFirstMob returned 15-second presigned S3 download URLs for a session's DOM-replay recording based solely on the session path parameter, while validateProjectAccess checked only that the project belonged to the requester's tenant and did not verify that the session belonged to that project, allowing any authenticated low-privilege user to read another tenant's first 15 seconds of session-replay recording data. This issue is fixed in version 1.27.0.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

July 10, 2026

Last Modified

July 13, 2026

Advisory Details (4)

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

Cross-tenant session replay disclosure via missing session ownership check in first-mob endpoint · Advisory · openreplay/openreplay · GitHub

https://github.com/openreplay/openreplay/security/advisories/GHSA-w2x5-m7w5-479h
github_release Patch Available

v1.27.0

Patch available: openreplay/openreplay v1.27.0

https://github.com/openreplay/openreplay/releases/tag/v1.27.0
github_pr

fix(backend): add session ownership check to first-mob handler

Fix merged in openreplay/openreplay PR #4692 on 2026-06-11 — awaiting tagged release

https://github.com/openreplay/openreplay/pull/4692
github_commit

commit ddd09117f644 (openreplay/openreplay)

Fix landed in openreplay/openreplay commit ddd09117f644 — awaiting tagged release

https://github.com/openreplay/openreplay/commit/ddd09117f644a309c7b040cda0a11ff9433e9e49

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 37× 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 110 total refreshes for this CVE.

  1. 2026-09-20 20:16 UTCEPSS rescore
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  74. 2026-07-18 10:04 UTCEPSS rescore
  75. 2026-07-16 17:03 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-55881?
CVE-2026-55881 is a high vulnerability published on July 10, 2026. OpenReplay is a self-hosted session replay suite. From 1.22.0 before 1.27.0, getFirstMob returned 15-second presigned S3 download URLs for a session's DOM-replay recording based solely on the session path parameter, while validateProjectAccess checked only that the project belonged to the…
When was CVE-2026-55881 disclosed?
CVE-2026-55881 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-2026-55881 actively exploited?
CVE-2026-55881 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 63.4% of all scored CVEs.
What is the CVSS score of CVE-2026-55881?
CVE-2026-55881 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-55881?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55881, 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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