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Advisory record · GHSA-3c45-4pj5-ch7m

changedetection.io is Vulnerable to SSRF via Watch URLs

CVSS 8.6 HighEPSS 0.0050 · 43rd percentile

Published by the GitHub Advisory Database at 25 Feb 2026, 19:08 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
changedetection-ioPyPI<0.54.10.54.1
Identifiers
GHSA-3c45-4pj5-ch7m · CVE-2026-27696 · PYSEC-2026-2126
Weakness (CWE)
CWE-918
Tags
Published
25 Feb 2026
Updated
13 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GHSA-3c45-4pj5-ch7m affects changedetection-io versions before 0.54.1. The URL validation does not check whether watch URLs resolve to private, loopback, or link-local addresses, so a user who can add a watch can make the server fetch internal URLs and view the stored responses. No authentication is needed when no password is set, which is the default. Upgrade to version 0.54.1.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.6 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0050, the 43rd percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:04 UTC First seen by agentprime
  2. 31 Oct 2026, 15:04 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.