CVE Details
CVE-2026-102489
Zammad GmbH Zammad Session Fixation Vulnerability
Published: 2026-10-02
CVSS: 8.7 HIGH
Product: Zammad GmbH Zammad
Due Date: 2026-10-05
Zammad GmbH Zammad contains a session fixation vulnerability that can lead to remote code execution as the zammad user. This vulnerability can be chained with CVE-2026-102490.
GitHub PoC
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FIRST EPSS
EPSS estimates the probability of exploitation in the next 30 days. Higher values indicate higher likelihood of real-world exploitation.
Timeline
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References
Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | cveId | CVE-2026-102489 |
| cveMetadata > | assignerOrgId | b87402ff-ae37-4194-9dae-31abdbd6f217 |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | assignerShortName | DIVD |
| cveMetadata > | dateReserved | 2026-09-29T09:46:12.490Z |
| cveMetadata > | datePublished | 2026-09-30T16:21:19.937Z |
| cveMetadata > | dateUpdated | 2026-10-02T09:00:15.264Z |
| containers > | cna > providerMetadata > orgId | b87402ff-ae37-4194-9dae-31abdbd6f217 |
| containers > | cna > providerMetadata > shortName | DIVD |
| containers > | cna > providerMetadata > dateUpdated | 2026-10-02T09:00:15.264Z |
| containers > | cna > title | Undisclosed RCE in Zammad v6.3 and higher |
| containers > | cna > datePublic | 2026-09-29T20:00:00.000Z |
| containers > | cna > affected > 0 > vendor | Zammad GmbH |
| containers > | cna > affected > 0 > product | Zammad |
| containers > | cna > affected > 0 > platforms > 0 | Linux |
| containers > | cna > affected > 0 > platforms > 1 | Docker |
| containers > | cna > affected > 0 > versions > 0 > status | unknown |
| containers > | cna > affected > 0 > versions > 0 > version | * |
| containers > | cna > affected > 0 > versions > 0 > lessThan | 6.3.0 |
| containers > | cna > affected > 0 > versions > 0 > versionType | semver |
| containers > | cna > affected > 0 > versions > 1 > status | affected |
| containers > | cna > affected > 0 > versions > 1 > version | 6.3.0 |
| containers > | cna > affected > 0 > versions > 1 > lessThan | 6.5.4 |
| containers > | cna > affected > 0 > versions > 1 > versionType | semver |
| containers > | cna > affected > 0 > versions > 2 > status | unaffected |
| containers > | cna > affected > 0 > versions > 2 > version | 7.0.0 |
| containers > | cna > affected > 0 > versions > 2 > lessThan | * |
| containers > | cna > affected > 0 > versions > 2 > versionType | semver |
| containers > | cna > affected > 0 > defaultStatus | unaffected |
| containers > | cna > descriptions > 0 > lang | en |
| containers > | cna > descriptions > 0 > value | Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The vulnerability is also present in version 7.0.0 to version 7.1.3, but not exploitable due to environment conditions. |
| containers > | cna > descriptions > 0 > supportingMedia > 0 > type | text/html |
| containers > | cna > descriptions > 0 > supportingMedia > 0 > base64 | False |
| containers > | cna > descriptions > 0 > supportingMedia > 0 > value | Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The vulnerability is also present in version 7.0.0 to version 7.1.3, but not exploitable due to environment conditions. |
| containers > | cna > references > 0 > url | https://csirt.divd.nl/DIVD-2026-00015 |
| containers > | cna > references > 0 > tags > 0 | third-party-advisory |
| containers > | cna > references > 1 > url | https://csirt.divd.nl/CVE-2026-102489 |
| containers > | cna > references > 1 > tags > 0 | third-party-advisory |
| containers > | cna > metrics > 0 > format | CVSS |
| containers > | cna > metrics > 0 > scenarios > 0 > lang | en |
| containers > | cna > metrics > 0 > scenarios > 0 > value | GENERAL |
| containers > | cna > metrics > 0 > cvssV4_0 > attackVector | NETWORK |
| containers > | cna > metrics > 0 > cvssV4_0 > attackComplexity | LOW |
| containers > | cna > metrics > 0 > cvssV4_0 > attackRequirements | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > privilegesRequired | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > userInteraction | PASSIVE |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnConfidentialityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV4_0 > subConfidentialityImpact | LOW |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnIntegrityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV4_0 > subIntegrityImpact | LOW |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnAvailabilityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV4_0 > subAvailabilityImpact | LOW |
| containers > | cna > metrics > 0 > cvssV4_0 > exploitMaturity | ATTACKED |
| containers > | cna > metrics > 0 > cvssV4_0 > Safety | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > Automatable | YES |
| containers > | cna > metrics > 0 > cvssV4_0 > Recovery | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > valueDensity | CONCENTRATED |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnerabilityResponseEffort | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > providerUrgency | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > version | 4.0 |
| containers > | cna > metrics > 0 > cvssV4_0 > baseSeverity | HIGH |
| containers > | cna > metrics > 0 > cvssV4_0 > baseScore | 8.7 |
| containers > | cna > metrics > 0 > cvssV4_0 > vectorString | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:A/AU:Y/V:C |
| containers > | cna > metrics > 1 > format | CVSS |
| containers > | cna > metrics > 1 > scenarios > 0 > lang | en |
| containers > | cna > metrics > 1 > scenarios > 0 > value | Chained with CVE-2026-102490 |
| containers > | cna > metrics > 1 > cvssV4_0 > attackVector | NETWORK |
| containers > | cna > metrics > 1 > cvssV4_0 > attackComplexity | LOW |
| containers > | cna > metrics > 1 > cvssV4_0 > attackRequirements | NONE |
| containers > | cna > metrics > 1 > cvssV4_0 > privilegesRequired | NONE |
| containers > | cna > metrics > 1 > cvssV4_0 > userInteraction | PASSIVE |
| containers > | cna > metrics > 1 > cvssV4_0 > vulnConfidentialityImpact | HIGH |
| containers > | cna > metrics > 1 > cvssV4_0 > subConfidentialityImpact | HIGH |
| containers > | cna > metrics > 1 > cvssV4_0 > vulnIntegrityImpact | HIGH |
| containers > | cna > metrics > 1 > cvssV4_0 > subIntegrityImpact | HIGH |
| containers > | cna > metrics > 1 > cvssV4_0 > vulnAvailabilityImpact | HIGH |
| containers > | cna > metrics > 1 > cvssV4_0 > subAvailabilityImpact | HIGH |
| containers > | cna > metrics > 1 > cvssV4_0 > exploitMaturity | ATTACKED |
| containers > | cna > metrics > 1 > cvssV4_0 > Safety | NOT_DEFINED |
| containers > | cna > metrics > 1 > cvssV4_0 > Automatable | YES |
| containers > | cna > metrics > 1 > cvssV4_0 > Recovery | NOT_DEFINED |
| containers > | cna > metrics > 1 > cvssV4_0 > valueDensity | CONCENTRATED |
| containers > | cna > metrics > 1 > cvssV4_0 > vulnerabilityResponseEffort | NOT_DEFINED |
| containers > | cna > metrics > 1 > cvssV4_0 > providerUrgency | NOT_DEFINED |
| containers > | cna > metrics > 1 > cvssV4_0 > version | 4.0 |
| containers > | cna > metrics > 1 > cvssV4_0 > baseSeverity | CRITICAL |
| containers > | cna > metrics > 1 > cvssV4_0 > baseScore | 9.4 |
| containers > | cna > metrics > 1 > cvssV4_0 > vectorString | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/V:C |
| containers > | cna > credits > 0 > lang | en |
| containers > | cna > credits > 0 > value | Earth Grob (Merlon Security) |
| containers > | cna > credits > 0 > type | finder |
| containers > | cna > credits > 1 > lang | en |
| containers > | cna > credits > 1 > value | Luke Paris (Merlon Security) |
| containers > | cna > credits > 1 > type | finder |
| containers > | cna > credits > 2 > lang | en |
| containers > | cna > credits > 2 > value | Tijmen van der Spijk (Merlon Security) |
| containers > | cna > credits > 2 > type | finder |
| containers > | cna > credits > 3 > lang | en |
| containers > | cna > credits > 3 > value | Zohar Cochavi (Merlon Security) |
| containers > | cna > credits > 3 > type | finder |
| containers > | cna > credits > 4 > lang | en |
| containers > | cna > credits > 4 > value | Alje Woltjer (Merlon Security) |
| containers > | cna > credits > 4 > type | finder |
| containers > | cna > credits > 5 > lang | en |
| containers > | cna > credits > 5 > value | Mischa Rick van Geelen (DIVD) |
| containers > | cna > credits > 5 > type | finder |
| containers > | cna > credits > 6 > lang | en |
| containers > | cna > credits > 6 > value | Ralph Horn (DIVD) |
| containers > | cna > credits > 6 > type | finder |
| containers > | cna > credits > 7 > lang | en |
| containers > | cna > credits > 7 > value | Max van der Horst (DIVD) |
| containers > | cna > credits > 7 > type | finder |
| containers > | cna > credits > 8 > lang | en |
| containers > | cna > credits > 8 > value | Victor Pasman (DIVD) |
| containers > | cna > credits > 8 > type | analyst |
| containers > | cna > credits > 9 > lang | en |
| containers > | cna > credits > 9 > value | Frank Breedijk (DIVD) |
| containers > | cna > credits > 9 > type | analyst |
| containers > | cna > source > advisory | DIVD-2026-00015 |
| containers > | cna > source > discovery | INTERNAL |
| containers > | cna > x_generator > engine | Vulnogram 1.0.5 |