CVE-2026-79668

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-08-25. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

Ech0 before 4.7.3 contains an authentication bypass vulnerability in the PUT /api/echo/like/:id endpoint that allows unauthenticated attackers to increment engagement metrics without identity verification or rate limiting. Attackers can send repeated requests to arbitrarily inflate the fav_count field for any known echo identifier, compromising the integrity of engagement metrics and social ranking systems.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ech0-before-unauthenticated-like-endpoint-metric-inflation
github Patch Available🟡 PoC Available

Unauthenticated Like Endpoint Enables Arbitrary Engagement Metric Inflation · Advisory · lin-snow/Ech0 · GitHub

https://github.com/lin-snow/Ech0/security/advisories/GHSA-rgj7-vg8v-j4wr

Vendor Advisories for CVE-2026-79668(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)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/lin-snow/ech0—1.4.8-0.20260503040728-a7e8b8e84bd1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 18× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 11:40 UTCEG score recompute
  3. 2026-08-29 11:39 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-28 13:33 UTCGHSA enrichment
  6. 2026-08-27 15:28 UTCEG score recompute
  7. 2026-08-27 15:28 UTCGHSA enrichment
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-26 17:23 UTCEG score recompute
  10. 2026-08-26 17:23 UTCGHSA enrichment
  11. 2026-08-26 16:23 UTCEG score recompute
  12. 2026-08-26 16:23 UTCGHSA enrichment
  13. 2026-08-26 14:47 UTCEPSS rescore
  14. 2026-08-26 10:21 UTCEG score recompute
  15. 2026-08-26 10:20 UTCGHSA enrichment
  16. 2026-08-25 12:17 UTCEG score recompute
  17. 2026-08-25 11:42 UTCEG score recompute
  18. 2026-08-25 11:41 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-79668?
CVE-2026-79668 is a medium vulnerability published on August 25, 2026. Ech0 before 4.7.3 contains an authentication bypass vulnerability in the PUT /api/echo/like/:id endpoint that allows unauthenticated attackers to increment engagement metrics without identity verification or rate limiting. Attackers can send repeated requests to arbitrarily inflate the fav_count…
When was CVE-2026-79668 disclosed?
CVE-2026-79668 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79668 actively exploited?
CVE-2026-79668 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 83.0% of all scored CVEs.
What is the CVSS score of CVE-2026-79668?
CVE-2026-79668 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-79668?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-79668, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-79668

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