CVE-2026-120635

HIGH
MEDIUM Priority: 0.04 BB Relevance: 66/100
Published: 2026-11-03 Modified: 2026-11-09 First seen: 2026-11-04 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Unchanged
C: High
I: None
A: High

Description

CGI versions before 5.00 for Perl allow form fields to be smuggled past proxies and WAFs via multipart parsing that differs from the RFCs. The multipart/form-data parser matches the boundary anywhere rather than at the start of a line, uses the boundary without its leading -- for some client-supplied User-Agent values, finds the Content-Disposition name and filename inside the quoted values of other parameters, and corrupts parts when the boundary nears the 4096-byte read size.

Affected Software (2)

VendorProductVersion
— — 0 < 5.00
— — 0 < 5.00

Bug Bounty Relevance

66 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

8.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS — Exploitation Probability

0.51%
Raw Score 0.005100
Percentile 44.1%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00510
2026-11-13
0.00510
2026-11-12
0.00510
2026-11-10
0.00510
2026-11-09
0.00198
2026-11-08
0.00198
2026-11-07
0.00198
2026-11-06
0.00198
2026-11-05
0.00198
2026-11-04
0.00198

Intelligence Sources

mitre ref →
nvd ref →