CVE-2026-1323
CVE-2026-1323 is a high-severity vulnerability in Cps-it Mailqueue with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v4: 5.2
- EPSS exploit prediction: 0% (12th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-12548
- Weakness: CWE-502
- Affected product: Cps-it Mailqueue
- Published:
- Last modified:
Description
The extension fails to properly define allowed classes used when deserializing transport failure metadata. An attacker may exploit this to execute untrusted serialized code. Note that an active exploit requires write access to the directory configured at $GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_spool_filepath'].
Frequently asked questions
- What is CVE-2026-1323?
- The extension fails to properly define allowed classes used when deserializing transport failure metadata. An attacker may exploit this to execute untrusted serialized code. Note that an active exploit requires write access to the directory configured at $GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_spool_filepath'].
- How severe is CVE-2026-1323?
- CVE-2026-1323 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-1323 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-1323?
- CVE-2026-1323 affects Cps-it Mailqueue. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-1323?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-1323 have an EU (EUVD) identifier?
- Yes. CVE-2026-1323 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12548.
- When was CVE-2026-1323 published?
- CVE-2026-1323 was published on 2026-03-17 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:cps-it:mailqueue:*:*:*:*:*:typo3:*:*
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