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Vulnerabilities

Vulnerability · GHSA-69hv-5jfc-mvmv

rewrite re-decodes {http.matchers.file.remainder}, bypassing path-based deny rules

Published Nov 4, 2026 · catalog updated Nov 4, 2026 · rewrite re-decodes {http.matchers.file.remainder}, bypassing

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for GHSA-69hv-5jfc-mvmv. A missing EPSS score is not a low risk. Compare rewrite re-decodes {http.matchers.file.remainder}, bypassing with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (rewrite re-decodes {http.matchers.file.remainder}, bypassing).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Medium—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Version ranges on file
Affected products
go github.com/caddyserver/caddy/v2

### Summary The rewrite handler inserts unescaped, then percent-decodes the rewritten URI again after the matchers already ran. A double-encoded path info such as becomes and reaches files a path-based deny rule protects; and in the path info replace the query string or truncate the path. ### Details holds decoded path text. ( ) escapes and before the rewritten URI is parsed, but not the remainder. The rewrite handler inserts it raw, cuts the result at and , and percent-decodes it a second time, after the matchers that ran on the original path. with and a rewrite to is the usual setup for PHP-style path info (FrankenPHP's generated it). Fix: escape the remainder with , like . A remainder without reserved characters, such as , is rewritten as before. Patch: public PR from . Discovered by Anthropic's OSS Scanner, as vulnerability ANT-2026-32RAL55Q. ### Proof of concept and exist: The first request is a single opaque segment for . After the rewrite it becomes , misses the PHP route and serves the protected file. ### Impact Unauthenticated clients read static files that a path-based rule placed before the rewrite is meant to deny, on sites that rewrite to (PHP-style path info). They can also change the query string or path the backend receives.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • go github.com/caddyserver/caddy/v2<= 2.11.7

How to fix GHSA-69hv-5jfc-mvmv

  • Upgrade

    GHSA-69hv-5jfc-mvmv lists a fix boundary at 2.11.7. Compare the installed build with that boundary before you change production.

  • Version check

    Affected <= 2.11.7

  • Advisory

    Open the inventory_github record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for GHSA-69hv-5jfc-mvmv. A missing EPSS score is not a low risk. Compare rewrite re-decodes {http.matchers.file.remainder}, bypassing with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with <= 2.11.7. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-174. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 4, 2026 · Maintainer security tabs

    Detected

    ### Summary The rewrite handler inserts unescaped, then percent-decodes the rewritten URI again after the matchers already ran. A double-encoded path info such as becomes and reaches files a path-based deny rule protects; and in the path info replace the query string or truncate the path. ### Details holds decoded path text. ( ) escapes and before the rewritten URI is parsed, but not the remainder

  2. Nov 4, 2026 · Maintainer security tabs

    Updated

    ### Summary The rewrite handler inserts unescaped, then percent-decodes the rewritten URI again after the matchers already ran. A double-encoded path info such as becomes and reaches files a path-based deny rule protects; and in the path info replace the query string or truncate the path. ### Details holds decoded path text. ( ) escapes and before the rewritten URI is parsed, but not the remainder

Sources

  • Maintainer security tabsVendor advisoryGHSA-69hv-5jfc-mvmv

    ### Summary The rewrite handler inserts unescaped, then percent-decodes the rewritten URI again after the matchers already ran. A double-encoded path info such as becomes and reaches files a path-based deny rule protects; and in the path info replace the query string or truncate the path. ### Details holds decoded path text. ( ) escapes and before the rewritten URI is parsed, but not the remainder

    github.com

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Maintainer security tabsNov 4, 2026