CVE-2026-23738 | The Asterisk embedded web server 's /httpstatus page echos user supplied values(cookie and query string) without sanitization

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.

Published: 2026-02-06 Last update: 2026-02-18 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-23738 is rated Low Risk (19.6/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.05%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-23738

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-15 0.04% 0.05% +0.01%
2 2026-04-02 0.07% 0.04% -0.03%
3 2026-04-01 — 0.07% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-23738

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.5 3.1 LOW
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.1 1.4 [email protected]
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]

Weakness enumeration for CVE-2026-23738

OS Trackers for CVE-2026-23738

vendor priority summary link
alpine — CVE-2026-23738: 1 source package rows (asterisk); 102 state rows across 6 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 0, open 102. https://security.alpinelinux.org/vuln/CVE-2026-23738
debian not yet assigned CVE-2026-23738 not yet assigned priority: Debian including 1 source packages (asterisk), 2 status rows across 2 suites (bullseye, sid): resolved 2. https://security-tracker.debian.org/tracker/CVE-2026-23738
ubuntu medium CVE-2026-23738 medium priority: Ubuntu including 1 source packages (asterisk), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): needs-triage 7. https://ubuntu.com/security/CVE-2026-23738

Affected software / configurations for CVE-2026-23738

Vendor Product Version Raw CPE
sangoma asterisk <= 20.18.2 cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
sangoma asterisk >= 21.0.0, <= 21.12.1 cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
sangoma asterisk >= 22.0.0, <= 22.8.2 cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
sangoma asterisk >= 23.0.0, < 23.2.2 cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
sangoma certified_asterisk <= 18.9 cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:*
sangoma certified_asterisk 20.7 cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:*
sangoma certified_asterisk 20.7 cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:*
sangoma certified_asterisk 20.7 cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:*
sangoma certified_asterisk 20.7 cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:*
sangoma certified_asterisk 20.7 cpe:2.3:a:sangoma:certified_asterisk:20.7:cert3:*:*:*:*:*:*
sangoma certified_asterisk 20.7 cpe:2.3:a:sangoma:certified_asterisk:20.7:cert4:*:*:*:*:*:*
sangoma certified_asterisk 20.7 cpe:2.3:a:sangoma:certified_asterisk:20.7:cert5:*:*:*:*:*:*
sangoma certified_asterisk 20.7 cpe:2.3:a:sangoma:certified_asterisk:20.7:cert6:*:*:*:*:*:*
sangoma certified_asterisk 20.7 cpe:2.3:a:sangoma:certified_asterisk:20.7:cert7:*:*:*:*:*:*
sangoma certified_asterisk 20.7 cpe:2.3:a:sangoma:certified_asterisk:20.7:cert8:*:*:*:*:*:*

References for CVE-2026-23738

cvelogic Threat Intelligence