Stanza injection in XMPP chat
CVSS score
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EPSS probability
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Risk score
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Published
3 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
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Evidence confidence
%55
Short explanation
Thunderbird failed to escape attribute values when serializing outgoing XMPP stanzas, allowing a remote XMPP user to trigger a stanza injection that can send messages or change settings on behalf of the user.
It matters because it allows attackers to send messages or alter subscription settings on behalf of the user without any interaction, specifically impacting Thunderbird's chat feature with XMPP accounts.
What should be done?
- Follow the vendor advisory
- Update to Thunderbird 158.0.1 or Thunderbird 153.5.1
Chain of evidence and sources
Thunderbird, giden XMPP stanza'larını serileştirirken öznitelik değerlerini kaçırmamaktadır.
Bu güvenlik açığı yalnızca Thunderbird'ün XMPP hesaplarına sahip sohbet özelliğini etkiler.
Bu güvenlik açığı Thunderbird 158.0.1 ve Thunderbird 153.5.1 sürümlerinde giderilmiştir.
Show the technical text from the sources
Thunderbird did not escape attribute values when serializing outgoing XMPP stanzas. Because values from incoming requests were echoed back in automatic replies, a remote XMPP user could send a crafted request that caused Thunderbird to inject arbitrary stanzas into the user's connection, which the server would then process as if sent by the user. This could be used to send messages or change contact and subscription settings on behalf of the user, without any interaction. This bug only affects Thunderbird's chat feature with XMPP accounts. This vulnerability was fixed in Thunderbird 158.0.1 and Thunderbird 153.5.1.
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-2026-113867 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | mozilla | thunderbird | View |
RED HAT CSAF/VEX: Product Impact Check
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.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
Patch and Remediation Guide
Solution & Remediation Advisory
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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-2026-113867 is associated with the following CWEs:
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-2026-113867 weaknesses.
Official Sources and Advisories
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