ETK-2026-3495Zero's internal tracking ID, independent of the CVE number.
waiting for further signalsZero needs more public information before it can validate it.no check availablenot proven exploitable
awaiting cvepublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
composer:symfony/filesystem >=5.4.0; <5.4.56; >=6; <6.4.50; >=7; <7.4.23; >=8; <8.1.11
fixed in 5.4.56, 6.4.50, 7.4.23, 8.1.11
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
ETK-2026-3495Zero's internal tracking ID, independent of the CVE number., no cve assigned
pkg:composer/symfony/filesystem
pkg:composer/symfony/symfony
cvss7.0ethiack provisional
1h 42msince last run
10mAI analysisAnalysis: how long the AI spent reversing this signal.
description
Symfony Filesystem Path helpers can mis-handle path normalization and allow a path to pass an intended base-directory check while resolving outside that directory. This affects applications that validate attacker-controlled paths before reading or writing them, and can also affect AssetMapper installations using a malicious or compromised remote package.
mitigation
Upgrade symfony/filesystem or symfony/symfony to 5.4.56, 6.4.50, 7.4.23, or 8.1.11, as applicable. Until upgraded, do not use these Path helpers as the sole containment check for untrusted paths, and avoid installing untrusted remote AssetMapper packages.
fixed in 5.4.56, 6.4.50, 7.4.23, 8.1.11
check
no
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
–
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
10m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
not published yet
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–
outcome
Contextual, not validated: no deterministic check could cover this one, and no technique passed our review.
source signals
Public signals that triggered or updated the pipeline. These are inputs for the deltas above.
- 2026-11-04 11:43Zghsa: trigger signal, started the run
this entry in the feed
GET /api/v1/feed/ETK-2026-3495
{ "etk_id": "ETK-2026-3495", "cve_id": null, "display_id": "ETK-2026-3495", "ghsa_id": "GHSA-6prc-h956-hxjq", "euvd_id": null, "status": "published", "anchor_state": "awaiting_cve", "title": "Path containment bypass in Symfony Filesystem", "summary": "Symfony Filesystem Path helpers can mis-handle path normalization and allow a path to pass an intended base-directory check while resolving outside that directory. This affects applications that validate attacker-controlled paths before reading or writing them, and can also affect AssetMapper installations using a malicious or compromised remote package.", "mitigation": "Upgrade symfony/filesystem or symfony/symfony to 5.4.56, 6.4.50, 7.4.23, or 8.1.11, as applicable. Until upgraded, do not use these Path helpers as the sole containment check for untrusted paths, and avoid installing untrusted remote AssetMapper packages.", "vendor": "composer", "product": "composer:symfony/filesystem", "affected": [ { "affected_notes": [], "affected_ranges": [ ">=5.4.0", "<5.4.56" ], "ecosystem": "composer", "fixed_versions": [ "5.4.56" ], "package_name": "symfony/filesystem", "purl": "pkg:composer/symfony/filesystem" }, { "affected_notes": [], "affected_ranges": [ ">=6", "<6.4.50" ], "ecosystem": "composer", "fixed_versions": [ "6.4.50" ], "package_name": "symfony/filesystem", "purl": "pkg:composer/symfony/filesystem" }, { "affected_notes": [], "affected_ranges": [ ">=7", "<7.4.23" ], "ecosystem": "composer", "fixed_versions": [ "7.4.23" ], "package_name": "symfony/filesystem", "purl": "pkg:composer/symfony/filesystem" }, { "affected_notes": [], "affected_ranges": [ ">=8", "<8.1.11" ], "ecosystem": "composer", "fixed_versions": [ "8.1.11" ], "package_name": "symfony/filesystem", "purl": "pkg:composer/symfony/filesystem" }, { "affected_notes": [], "affected_ranges": [ ">=5.4.0", "<5.4.56" ], "ecosystem": "composer", "fixed_versions": [ "5.4.56" ], "package_name": "symfony/symfony", "purl": "pkg:composer/symfony/symfony" }, { "affected_notes": [], "affected_ranges": [ ">=6", "<6.4.50" ], "ecosystem": "composer", "fixed_versions": [ "6.4.50" ], "package_name": "symfony/symfony", "purl": "pkg:composer/symfony/symfony" }, { "affected_notes": [], "affected_ranges": [ ">=7", "<7.4.23" ], "ecosystem": "composer", "fixed_versions": [ "7.4.23" ], "package_name": "symfony/symfony", "purl": "pkg:composer/symfony/symfony" }, { "affected_notes": [], "affected_ranges": [ ">=8", "<8.1.11" ], "ecosystem": "composer", "fixed_versions": [ "8.1.11" ], "package_name": "symfony/symfony", "purl": "pkg:composer/symfony/symfony" } ], "cwes": [ 22 ], "cvss_score": 7, "cvss_src": "ethiack_provisional", "cvss_vector": null, "epss_score": null, "epss_percentile": null, "epss_asof": null, "automation": "contextual", "check": false, "check_confidence_basis": null, "exploit": false, "pipeline_minutes": 9.900323283333334, "t0_at": null, "signals": { "trigger_signal": { "at": "2026-11-04T11:43:35+00:00", "days": -0.08375942136574074, "is_lower_bound": true, "measured_at": "2026-11-04T13:44:11.930320+00:00", "url": "https://github.com/symfony/symfony/security/advisories/GHSA-6prc-h956-hxjq" } } }
published 2026-11-04 12:25Z
last change 2026-11-04 13:33Z
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