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Fencer Intel
medium 5.3

CVE-2016-9646 json

Commit metadata forgery via CGI::FormBuilder context-dependent APIs

published 2018-04-13 8 y ago modified 2026-06-17 4 mo ago also EUVD-2016-10447

cvss
5.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

ikiwiki before 3.20161229 incorrectly called the CGI::FormBuilder->field method (similar to the CGI->param API that led to Bugzilla's CVE-2014-1572), which can be abused to lead to commit metadata forgery.

Patch / fix

  • ikiwiki ikiwiki 3.20161229
  • ikiwiki Debian 14, Debian 13, Debian 12 3.20161229

debian advisories DEBIAN-CVE-2016-9646

  • ikiwiki openSUSE Tumbleweed 3.20200202.3-2.7

opensuse advisories openSUSE-SU-2024:10860-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-9646 updated cvss 5.3

ikiwiki: Commit metadata forgery

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.14% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

  • ikiwiki ikiwiki

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.