CVE-2026-63004

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (30th percentile of EPSS-scored CVEs). 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
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Unleash is an open-source feature management platform. Prior to 7.5.2, 7.6.5, and 8.0.2, the addon and integration subsystem passes the operator-controlled parameters.url value from src/lib/addons/webhook.ts and the Slack, Microsoft Teams, Datadog, and New Relic integrations to Addon.fetchRetry in src/lib/addons/addon.ts without restricting loopback, link-local, private, or cloud metadata addresses. An authenticated actor with the root CREATE_ADDON or UPDATE_ADDON permission can cause the server to send requests from inside its network boundary, use integration event status as a blind probing oracle, forward Authorization, customHeaders, or DD-API-KEY values to an attacker-observed host, and deliver the feature-event JSON body to internal services. This issue is fixed in versions 7.5.2, 7.6.5, and 8.0.2.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
41
EG Risk 41/100CISA SSVC

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
Severity55% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
30th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 21, 2026

Last Modified

September 9, 2026

Advisory Details (7)

Auto-updated Aug 21, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

v8.0.2

Patch available: Unleash/unleash v8.0.2

https://github.com/Unleash/unleash/releases/tag/v8.0.2
github_release Patch Available

v7.6.5

Patch available: Unleash/unleash v7.6.5

https://github.com/Unleash/unleash/releases/tag/v7.6.5
github_release Patch Available

v7.5.2

Patch available: Unleash/unleash v7.5.2

https://github.com/Unleash/unleash/releases/tag/v7.5.2
github_commit Patch Available

commit d862562a5ab8 (Unleash/unleash)

Patch available: Unleash/unleash v7.5.2 (contains commit d862562a5ab8)

https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d
github_commit Patch Available

commit d45f99df924c (Unleash/unleash)

Patch available: Unleash/unleash v7.6.5 (contains commit d45f99df924c)

https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1
github_commit Patch Available

commit 2100db76af34 (Unleash/unleash)

Patch available: Unleash/unleash v8.0.2 (contains commit 2100db76af34)

https://github.com/Unleash/unleash/commit/2100db76af3473f13e6fb40096cf17a9c2b741a1
githubMentions a patch (unverified)🟡 PoC Available

Addon webhook URL is dialed server-side with no internal-address filtering, enabling SSRF to internal services / cloud metadata and exfiltration of configured request headers · Advisory · Unleash/unleash · GitHub

https://github.com/Unleash/unleash/security/advisories/GHSA-5vf6-jrqr-78fj

Vendor Advisories for CVE-2026-63004(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
unleash-server—
  • every version up to 7.5.2: fixed in 7.5.2
  • 7.6.0 up to 7.6.5: fixed in 7.6.5
  • 8.0.0 up to 8.0.2: fixed in 8.0.2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 42× 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. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:13 UTCEPSS rescore
  4. 2026-10-08 07:23 UTCEG score recompute
  5. 2026-10-07 23:48 UTCEPSS rescore
  6. 2026-10-07 05:13 UTCEG score recompute
  7. 2026-10-06 15:18 UTCEPSS rescore
  8. 2026-10-06 03:04 UTCEG score recompute
  9. 2026-10-05 17:43 UTCEPSS rescore
  10. 2026-10-04 23:22 UTCEPSS rescore
  11. 2026-10-03 16:42 UTCEG score recompute
  12. 2026-10-03 14:26 UTCEPSS rescore
  13. 2026-10-02 17:56 UTCEPSS rescore
  14. 2026-10-02 13:21 UTCEG score recompute
  15. 2026-10-01 19:50 UTCEPSS rescore
  16. 2026-10-01 11:09 UTCEG score recompute
  17. 2026-09-30 15:03 UTCEPSS rescore
  18. 2026-09-30 08:55 UTCEG score recompute
  19. 2026-09-29 06:46 UTCEG score recompute
  20. 2026-09-28 13:51 UTCEPSS rescore
  21. 2026-09-28 04:38 UTCEG score recompute
  22. 2026-09-27 02:28 UTCEG score recompute
  23. 2026-09-26 15:59 UTCEPSS rescore
  24. 2026-09-25 04:14 UTCEG score recompute
  25. 2026-09-24 02:05 UTCEG score recompute
Show 50 more
  1. 2026-09-23 17:54 UTCEPSS rescore
  2. 2026-09-22 23:56 UTCEG score recompute
  3. 2026-09-21 21:47 UTCEG score recompute
  4. 2026-09-20 20:16 UTCEPSS rescore
  5. 2026-09-19 17:28 UTCEG score recompute
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 15:19 UTCEG score recompute
  8. 2026-09-17 13:10 UTCEG score recompute
  9. 2026-09-16 14:08 UTCEPSS rescore
  10. 2026-09-16 11:01 UTCEG score recompute
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 08:52 UTCEG score recompute
  13. 2026-09-14 06:43 UTCEG score recompute
  14. 2026-09-13 04:34 UTCEG score recompute
  15. 2026-09-12 02:25 UTCEG score recompute
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 09:37 UTCEPSS rescore
  18. 2026-09-11 00:16 UTCEG score recompute
  19. 2026-09-09 01:46 UTCEG score recompute
  20. 2026-09-08 22:01 UTCEPSS rescore
  21. 2026-09-07 16:01 UTCEPSS rescore
  22. 2026-09-07 07:03 UTCEG score recompute
  23. 2026-09-06 13:47 UTCEPSS rescore
  24. 2026-09-06 04:53 UTCEG score recompute
  25. 2026-09-05 15:31 UTCEPSS rescore
  26. 2026-09-05 02:44 UTCEG score recompute
  27. 2026-09-04 05:07 UTCEPSS rescore
  28. 2026-09-02 22:24 UTCEG score recompute
  29. 2026-09-02 14:12 UTCEPSS rescore
  30. 2026-09-01 20:15 UTCEG score recompute
  31. 2026-09-01 13:54 UTCEPSS rescore
  32. 2026-09-01 04:40 UTCEPSS rescore
  33. 2026-08-31 18:07 UTCEG score recompute
  34. 2026-08-30 19:17 UTCEPSS rescore
  35. 2026-08-30 13:45 UTCEG score recompute
  36. 2026-08-30 01:22 UTCEPSS rescore
  37. 2026-08-29 11:37 UTCEG score recompute
  38. 2026-08-28 21:42 UTCEPSS rescore
  39. 2026-08-27 07:08 UTCEG score recompute
  40. 2026-08-26 14:46 UTCEPSS rescore
  41. 2026-08-26 04:58 UTCEG score recompute
  42. 2026-08-25 13:49 UTCEPSS rescore
  43. 2026-08-25 02:49 UTCEG score recompute
  44. 2026-08-24 00:41 UTCEG score recompute
  45. 2026-08-23 00:19 UTCEPSS rescore
  46. 2026-08-21 20:23 UTCEG score recompute
  47. 2026-08-21 19:34 UTCEG score recompute
  48. 2026-08-21 19:21 UTCEG score recompute
  49. 2026-08-21 18:19 UTCEG score recompute
  50. 2026-08-21 18:19 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-63004?
CVE-2026-63004 is a medium vulnerability published on August 21, 2026. Unleash is an open-source feature management platform. Prior to 7.5.2, 7.6.5, and 8.0.2, the addon and integration subsystem passes the operator-controlled parameters.url value from src/lib/addons/webhook.ts and the Slack, Microsoft Teams, Datadog, and New Relic integrations to Addon.fetchRetry in…
When was CVE-2026-63004 disclosed?
CVE-2026-63004 was first published on August 21, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63004 actively exploited?
CVE-2026-63004 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (30th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-63004?
CVE-2026-63004 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-63004?
A fix for CVE-2026-63004 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-63004 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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