CVE-2025-62126Network attack vector

Unauthenticated retrieval of embedded sensitive data

Published Dec 31, 2025 · Updated Dec 31, 2025

Sensitive data exposure in Varnish/Nginx Proxy Caching 1.8.3 and earlier allows remote attackers to retrieve embedded sensitive data. The published advisory does not identify the affected file, function, request path, or operation that inserts sensitive content into sent data. Unauthenticated network access with no user interaction is sufficient; the CNA text reports data retrieval, but its structured impact assessment conflicts.

CVSS severity5.3
Medium
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive data exposure in Varnish/Nginx Proxy Caching 1.8.3 and earlier allows remote attackers to retrieve embedded sensitive data. The published advisory does not identify the affected file, function, request path, or operation that inserts sensitive content into sent data. Unauthenticated network access with no user interaction is sufficient; the CNA text reports data retrieval, but its structured impact assessment conflicts.

The record

CVE
CVE-2025-62126
Published
Dec 31, 2025
Updated
Dec 31, 2025
Vendor
Razvan Stanga
Product
Varnish/Nginx Proxy Caching
Classifications
CWE-201, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 31, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=1.8.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Razvan Stanga · Varnish/Nginx Proxy Cachingversion=n/a <=1.8.3

Published CVSS scores

5.3PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-201Insertion of Sensitive Information Into Sent Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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