CVE-2025-64702

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 70% 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
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.

quic-go is an implementation of the QUIC protocol in Go. Versions 0.56.0 and below are vulnerable to excessive memory allocation through quic-go's HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame that decodes into a large header field section (many unique header names and/or large values). The implementation builds an http.Header (used on the http.Request and http.Response, respectively), while only enforcing limits on the size of the (QPACK-compressed) HEADERS frame, but not on the decoded header, leading to memory exhaustion. This issue is fixed in version 0.57.0.

CVSS v3
5.3
EG Score
5.3(medium)
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
30%
KEV
Not listed

Published

December 11, 2025

Last Modified

June 17, 2026

References (2)

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
golang-github-lucas-clemente-quic-go0.19.3-1 ... 0.59.0-2~bpo13+1 (30 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
golang-github-lucas-clemente-quic-go0.29.0-1 ... 0.59.0-2~bpo13+1 (23 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
golang-github-lucas-clemente-quic-go0.50.1-2 ... 0.59.0-2~bpo13+1 (9 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
golang-github-lucas-clemente-quic-go0.50.1-2 ... 0.55.0-1 (6 versions)0.59.0-1—
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/quic-go/quic-go—0.57.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 28× 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 153 total refreshes for this CVE.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-19 15:42 UTCEPSS rescore
  3. 2026-09-18 19:27 UTCEPSS rescore
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  24. 2026-08-26 11:02 UTCOSV refresh
  25. 2026-08-25 13:48 UTCEPSS rescore
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  1. 2026-08-24 14:16 UTCEPSS rescore
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  20. 2026-08-08 07:08 UTCEG score recompute
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  41. 2026-07-23 13:19 UTCOSV refresh
  42. 2026-07-23 03:01 UTCEG score recompute
  43. 2026-07-22 14:08 UTCEPSS rescore
  44. 2026-07-20 17:08 UTCEPSS rescore
  45. 2026-07-19 14:30 UTCEPSS rescore
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  73. 2026-06-29 14:06 UTCEPSS rescore
  74. 2026-06-29 14:06 UTCEPSS rescore
  75. 2026-06-28 14:07 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-64702?
CVE-2025-64702 is a medium vulnerability published on December 11, 2025. quic-go is an implementation of the QUIC protocol in Go. Versions 0.56.0 and below are vulnerable to excessive memory allocation through quic-go's HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame that decodes into a large header field section (many unique header…
When was CVE-2025-64702 disclosed?
CVE-2025-64702 was first published in the National Vulnerability Database on December 11, 2025, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-64702 actively exploited?
CVE-2025-64702 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 69.8% of all scored CVEs.
What is the CVSS score of CVE-2025-64702?
CVE-2025-64702 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2025-64702?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-64702, 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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