Is there a public exploit for CVE-2026-126352?

No public exploit for CVE-2026-126352 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-126352?

CVE-2026-126352 scores CVSS 5.9 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0%.

What does CVE-2026-126352 affect?

CVE-2026-126352 affects sporkmonger addressable.

5.9 Medium

Addressable: Regular Expression Denial of Service in templates with multiple variables

CVE-2026-126352

Impact Within the URI template implementation in Addressable, templates that put several variables in one expression generate regular expressions vulnerable to excessive backtracking: 1. Expressions with any operator other than + and # (e.g., {/owner,repo,ref}, {.a,b}, {a,b,c}, {;a,b,c}). The values are joined by an optional separator, so a run of characters can be divided among the variables in O(n^k) ways for k variables. 2. Expressions with the + or # operators and many variables (e.g., {+v1,v2,v3,v4,v5,v6,v7,v8,v9,v10}). A failing match is exponential in the number of variables. 3. Several single-variable expressions next to each other (e.g., {+a}{+b}{+c} or {a}{b}{c}), which are polynomial in the input length. When Template#match or Template#extract is called with a maliciously crafted URI, this can result in uncontrolled resource consumption, leading to denial of service. A three-variable path template such as http://example.com/repos{/owner,repo,ref} needs about 2 KB of input to occupy a thread for many seconds. Users of the URI parsing capabilities in Addressable but not the URI template matching capabilities are unaffected. Users who only call Template#expand are…

Assessment

CVSS: 5.9 (v3.1)
Severity: Medium
EPSS: 0% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 12 November 2026
Last updated: 12 November 2026
Affected: sporkmonger · addressable · addressable
Weakness: CWE-1333
Assigner: GitHub_M

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

At the source

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