CVE-2026-33981Public exploitNetwork attack vector

Environment-variable disclosure via unrestricted jq env builtin

Published Mar 27, 2026 · Updated Mar 27, 2026

Information disclosure in changedetection.io before 0.54.7 allows remote authenticated users to read process environment variables. The jq and jqraw include-filter paths in changedetectionio/html_tools.py compile and execute user-supplied jq expressions without blocking the env builtin, which writes every process environment variable into the watch snapshot. Authentication is required only when a password or API key is configured; the default configuration exposes the API without either credential, and disclosed values can include password hashes, proxy credentials, API keys, and tokens.

CVSS severity8.3
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in changedetection.io before 0.54.7 allows remote authenticated users to read process environment variables. The jq and jqraw include-filter paths in changedetectionio/html_tools.py compile and execute user-supplied jq expressions without blocking the env builtin, which writes every process environment variable into the watch snapshot. Authentication is required only when a password or API key is configured; the default configuration exposes the API without either credential, and disclosed values can include password hashes, proxy credentials, API keys, and tokens.

The record

CVE
CVE-2026-33981
Published
Mar 27, 2026
Updated
Mar 27, 2026
Vendor
changedetection.io
Product
changedetection.io
Classifications
CWE-200, T1552
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 2026Record 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=< 0.54.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

changedetection.io · changedetection.ioversion=< 0.54.7

Published CVSS scores

8.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552Unsecured Credentials

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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