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CVE-2026-57196

Asterisk: Reflected XSS in Phone Provisioning HTTP Error Pages

CVSS score

2.3

EPSS probability

—

Risk score

0.2

Published

2 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Asterisk Phone Provisioning HTTP Error Pages Reflected XSS Vulnerability

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

A reflected cross-site scripting vulnerability in Asterisk phone provisioning HTTP error pages allows an unauthenticated attacker to retrieve an authorized user's AMI session cookie and impersonate that user.

Why does it matter?

This vulnerability can lead to session compromise of authorized users in affected Asterisk deployments, undermining system confidentiality and integrity.

What should be done?

  • Follow vendor advisories and updates.
  • Apply patching guidance for the respective versions.
  • Ensure components disabled by default remain disabled unless strictly necessary.
Chain of evidence and sources2 verified claims

Asterisk telefon sağlama HTTP hata sayfalarında yansıtmalı XSS zafiyeti bulunmaktadır.

S0 · daybreach-canonicalS1 · cvelist

Saldırgan yetkili bir kullanıcının AMI oturum çerezini ele geçirebilir ve o kullanıcıyı taklit edebilir.

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an unauthenticated attacker may use reflected cross-site scripting in `phone provisioning HTTP error pages` to retrieve an authorized user's `AMI session cookie` and impersonate that user when `res_phoneprov` is enabled. The Asterisk HTTP web server, Asterisk Manager Interface (AMI), and AMI access via HTTP must all be enabled; each is disabled by default. The attacker must be able to connect to the HTTP server, which binds only to `127.0.0.1` by default even when enabled, and must convince the authorized user to click a malicious link. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

CWE: CWE-79

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-57196 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1asteriskasterisk View
2asteriskcertified-asterisk View
Total affected vendors: 1|Products: 2

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
2.3CVSS V40LOWCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD
2.3CVSS V4_0LOWCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:NCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-57196 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-57196 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
User—

Official Sources and Advisories

https://github.com/asterisk/asterisk/security/advisories/GHSA-4pgv-j3mr-3rcpvendor-advisoryhttps://github.com/asterisk/asterisk/commit/4373f8174bf71c467fc9db96036126d30425b9e8vendor-advisoryhttps://github.com/asterisk/asterisk/commit/4b360a61d649a7c12b1021aa554642322ee28c10vendor-advisoryhttps://github.com/asterisk/asterisk/commit/60c23d8b56b2cf93caceb527e07654b16f388343vendor-advisoryhttps://github.com/asterisk/asterisk/commit/87399593cda601ae3670bf890bdb32f78e881bf3vendor-advisoryhttps://github.com/asterisk/asterisk/commit/9cff8e62fbd9e7db87c233de3335047df88877d0vendor-advisoryhttps://github.com/asterisk/asterisk/commit/dc43c5b32a3a216da4c9e95388fbadaca3e78bc8vendor-advisoryhttps://github.com/asterisk/asterisk/commit/e6998409f73f49959d0062c695bb9a2f611af5acvendor-advisoryhttps://github.com/asterisk/asterisk/releases/tag/20.20.1vendor-advisoryhttps://github.com/asterisk/asterisk/releases/tag/21.12.3vendor-advisory

CVSS Vector Radar Chart

2.3 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.RequiredConfidentialityLowIntegrityNoneAvailabilityLow

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionP
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)P
Availability (Erişilebilirlik)Low

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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Weakness Type (CWE & CAPEC)

CWE-79

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CVE-2026-57196 · Asterisk: Reflected XSS in Phone…