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Back to active CVEs
High · CVSS 7.1CVE-2026-57188

Asterisk: Stack buffer overflow in res_xmpp XMPP namespace prefix handlingCVE-2026-57188

Answer in brief

CVE-2026-57188 records a High severity (CVSS 7.1) vulnerability in Asterisk: Stack buffer overflow in res_xmpp XMPP namespace prefix handling. The current sources do not mark it as known exploited. The current feed maps asterisk/asterisk (generic), asterisk/certified-asterisk (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.1
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps asterisk/asterisk (generic), asterisk/certified-asterisk (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
asterisk/asteriskgeneric<20.20.1 || >=21.0.0-pre1 <21.12.3 || >=22.0.0-pre1 <22.10.1 || >=23.0.0-pre1 <23.4.120.20.1, 21.12.3, 22.10.1, 23.4.1
asterisk/certified-asteriskgeneric<20.7-cert11 || >=22.8-cert1-pre1 <22.8-cert320.7-cert11, 22.8-cert3

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for asterisk/asterisk, asterisk/certified-asterisk.
  2. 2Review the reported fix. Update asterisk/asterisk to 20.20.1; asterisk/certified-asterisk to 20.7-cert11 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 27, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

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 authenticated attacker may cause a stack buffer overflow in `res_xmpp` `XMPP namespace prefix` handling using carefully crafted packets. The `res_xmpp` module must be loaded, an XMPP connection must be configured in `xmpp.conf`, and the attacker must have an XMPP account on the same or a federated server. 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Asterisk: ARI setChannelVar bypasses live_dangerously and permits FILE() writesSame asterisk/asterisk package

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Oct 27, 2026
References
15 linked sources
Open source record