CVE-2026-49998

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 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
Elevated
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.2Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.1, Centrifugo dynamic JWKS endpoint verification could reuse a key for one allowed issuer to verify a JWT for another allowed issuer because the JWKS cache and singleflight lookup were keyed only by JWT header kid, not by the resolved JWKS endpoint, issuer, audience, or trust-domain namespace, affecting client.token.jwks_public_endpoint, client.subscription_token.jwks_public_endpoint, internal/jwks/cache.go, and internal/jwks/manager.go. This issue is fixed in version 6.8.1.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
53
EG Risk 53/100

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
Severity82% × 45%
Exploitation40% × 40%
Automatability0% × 15%
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

Published

July 1, 2026

Last Modified

July 17, 2026

Advisory Details (4)

Auto-updated Jul 16, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
githubMentions a patch (unverified)🟡 PoC Available

Dynamic JWKS key cache keyed only by `kid` allows cross-issuer JWT authentication bypass · Advisory · centrifugal/centrifugo · GitHub

https://github.com/centrifugal/centrifugo/security/advisories/GHSA-g6vg-wj8f-48cj
github_release Patch Available

v6.8.1

Patch available: centrifugal/centrifugo v6.8.1

https://github.com/centrifugal/centrifugo/releases/tag/v6.8.1
github_pr

Fix: Scope JWKS cache by resolved endpoint URL

Fix merged in centrifugal/centrifugo PR #1142 on 2026-05-27 — awaiting tagged release

https://github.com/centrifugal/centrifugo/pull/1142
github_commit

commit 15d785015c6f (centrifugal/centrifugo)

Fix landed in centrifugal/centrifugo commit 15d785015c6f — awaiting tagged release

https://github.com/centrifugal/centrifugo/commit/15d785015c6f318c1b68ea40b813699c9f8bd2c4

Vendor Advisories for CVE-2026-49998(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(5 across 1 ecosystem)
Go(5)
PackageVulnerable rangeFix by version rangeDependents
github.com/centrifugal/centrifugo—
  • every version through 2.4.0: no fix on record
  • every version on: no fix on record
—
github.com/centrifugal/centrifugo/v3—
  • every version through 3.2.3: no fix on record
  • every version on: no fix on record
—
github.com/centrifugal/centrifugo/v4—
  • every version through 4.1.5: no fix on record
  • every version on: no fix on record
—
github.com/centrifugal/centrifugo/v5—
  • every version through 5.4.9: no fix on record
  • every version on: no fix on record
—
github.com/centrifugal/centrifugo/v6—
  • every version up to 6.8.1: fixed in 6.8.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 26× 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 109 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:12 UTCEPSS rescore
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  1. 2026-09-11 14:53 UTCEPSS rescore
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  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-06 14:26 UTCEG score recompute
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  11. 2026-08-30 23:28 UTCEG score recompute
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  26. 2026-08-20 04:36 UTCEG score recompute
  27. 2026-08-19 17:04 UTCEPSS rescore
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  29. 2026-08-18 13:48 UTCEPSS rescore
  30. 2026-08-17 23:19 UTCEG score recompute
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  40. 2026-08-12 23:40 UTCEG score recompute
  41. 2026-08-12 13:51 UTCEPSS rescore
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  45. 2026-08-09 15:09 UTCEG score recompute
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  66. 2026-07-28 15:37 UTCEPSS rescore
  67. 2026-07-28 00:51 UTCEG score recompute
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  69. 2026-07-26 14:54 UTCEPSS rescore
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  71. 2026-07-25 14:18 UTCEPSS rescore
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  74. 2026-07-23 03:18 UTCEG score recompute
  75. 2026-07-22 14:08 UTCEPSS rescore

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2 shown

Go:github.com/centrifugal/centrifugo

Frequently asked(5)

What is CVE-2026-49998?
CVE-2026-49998 is a high vulnerability published on July 1, 2026. Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.1, Centrifugo dynamic JWKS endpoint verification could reuse a key for one allowed issuer to verify a JWT for another allowed issuer because the JWKS cache and singleflight lookup were keyed only by JWT header kid, not…
When was CVE-2026-49998 disclosed?
CVE-2026-49998 was first published on July 1, 2026, with the most recent update on July 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49998 actively exploited?
CVE-2026-49998 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-49998?
CVE-2026-49998 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-49998?
A fix for CVE-2026-49998 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49998 are linked in the Vendor Advisories panel on this page.

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