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Fencer Vulns
low 3.5

CVE-2026-23738 json

The Asterisk embedded web server 's /httpstatus page echos user supplied values(cookie and query string) without sanitization

published 2026-02-06 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-5645

cvss
3.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits
0
none known

Summary

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, user supplied/control values for Cookies and any GET variable query Parameter are directly interpolated into the HTML of the page using ast_str_append. The endpoint at GET /httpstatus is the potential vulnerable endpoint relating to asterisk/main /http.c. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.

Patch / fix

  • asterisk certified_asterisk 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, 23.2.2
  • asterisk open_source 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, 23.2.2
  • digium asterisk 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, 23.2.2
  • digium certified_asterisk 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, 23.2.2
  • sangoma certified_asterisk 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, 23.2.2
  • asterisk Debian 14 1:22.8.2+dfsg+~cs6.15.60671435-1

debian advisories DEBIAN-CVE-2026-23738

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-2026-23738 updated cvss 4.6

asterisk: embedded /httpstatus page echos user supplied values without sanitization

  • 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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
9 mo ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

  • asterisk asterisk

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns 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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.