Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to 3.3.13, users who can manage events or create content, including speakers who can upload material, can store crafted javascript URLs in fields that accept custom URLs. A user who follows one of these URLs can execute attacker-controlled script in the user's browser in the Indico origin. This issue is fixed in version 3.3.13.
CVE-2026-107396
MEDIUMPre-NVD 5.45.4
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: secondary
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.4Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 5.4
- EG Score
- 5.4MEDIUMlow confidence
- EG Risk
- 24EG Risk 24/100CISA SSVC
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 computedSeverity54% × 45%Exploitation0% × 40%Automatability0% × 15%CISA SSVC: Track at every mission impact level.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.2%
- EPSS %ILE
- 8th
- KEV
- Not listed
CISA SSVCTrack at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 8, 2026
Last Modified
October 9, 2026
Advisory Details (4)
Auto-updated Oct 8, 2026Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available
v3.3.13
Patch available: indico/indico v3.3.13
https://github.com/indico/indico/releases/tag/v3.3.13github_commit Patch Available
commit d4c8c7127176 (indico/indico)
Patch available: indico/indico v3.3.13 (contains commit d4c8c7127176)
https://github.com/indico/indico/commit/d4c8c7127176efa4cb53c64119ca8ee2b551be18github_pr Patch Available
Correctly sanitize notes + validate URLs
Patch available: indico/indico v3.3.13 (PR #7619 merged 2026-06-30)
https://github.com/indico/indico/pull/7619githubMentions a patch (unverified)
Cross-Site-Scripting in link fields · Advisory · indico/indico · GitHub
https://github.com/indico/indico/security/advisories/GHSA-c4wc-ggrj-jg9vVendor Advisories for CVE-2026-107396(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)
PyPI(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| indico | 0.98-rc1 ... 3.3.9 (100 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 5× in last 7d / 5× 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.
- 2026-10-09 20:06 UTCEPSS rescore
- 2026-10-09 16:35 UTCEG score recompute
- 2026-10-09 15:26 UTCEG score recompute
- 2026-10-08 20:19 UTCEG score recompute
- 2026-10-08 20:04 UTCEG score recompute
Related CVEs(same product + same CWE)
Same product
10 shownPyPI:indico
Frequently asked(5)
What is CVE-2026-107396?
CVE-2026-107396 is a medium vulnerability published on October 8, 2026. Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to 3.3.13, users who can manage events or create content, including speakers who can upload material, can store crafted javascript URLs in fields that accept custom URLs. A user…
When was CVE-2026-107396 disclosed?
CVE-2026-107396 was first published on October 8, 2026, with the most recent update on October 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-107396 actively exploited?
CVE-2026-107396 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107396?
CVE-2026-107396 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-107396?
A fix for CVE-2026-107396 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-107396 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-107396
Is Your Infrastructure Affected by CVE-2026-107396?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.