CVE-2026-48784Network attack vector

Off-route URL generation via skipped dot-segment encoding

Published Jul 14, 2026 · Updated Jul 14, 2026

Encoding errors in Symfony Routing allow remote attackers to generate URLs that resolve to unintended paths under RFC 3986 normalization. UrlGenerator::doGenerate() used strtr() on the generated path, whose consumed trailing slash left every other adjacent ./ or ../ segment unencoded. Exploitation requires a route parameter that accepts dots and slashes and user interaction with a generated link through a strict RFC 3986 consumer; normalization then leaves the intended route.

CVSS severity5.1
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Encoding errors in Symfony Routing allow remote attackers to generate URLs that resolve to unintended paths under RFC 3986 normalization. UrlGenerator::doGenerate() used strtr() on the generated path, whose consumed trailing slash left every other adjacent ./ or ../ segment unencoded. Exploitation requires a route parameter that accepts dots and slashes and user interaction with a generated link through a strict RFC 3986 consumer; normalization then leaves the intended route.

The record

CVE
CVE-2026-48784
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Symfony
Product
Symfony Routing
Classifications
CWE-172, CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 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=< 5.4.53
  2. Affected versionversion=>= 6.0.0-BETA1, < 6.4.41
  3. Affected versionversion=>= 7.0.0-BETA1, < 7.4.13
  4. Affected versionversion=>= 8.0.0-BETA1, < 8.0.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Symfony · Symfony Routingversion=< 5.4.53; version=>= 6.0.0-BETA1, < 6.4.41; version=>= 7.0.0-BETA1, < 7.4.13; version=>= 8.0.0-BETA1, < 8.0.13
Symfony · Symfonyversion=< 5.4.53; version=>= 6.0.0-BETA1, < 6.4.41; version=>= 7.0.0-BETA1, < 7.4.13; version=>= 8.0.0-BETA1, < 8.0.13

Published CVSS scores

5.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-172Encoding Error
CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001User Execution: Malicious Link

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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