HIGH
Firebird: DoS via `op_response` packet from client
Published Apr 17, 2026
7.5
HIGHCVSS 3.1
EPSS 0.69%
Description
Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the xdr_status_vector() function does not handle the isc_arg_cstring type when decoding an op_response packet, causing a server crash when one is encountered in the status vector. An unauthenticated attacker can exploit this by sending a crafted op_response packet to the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
Affected products
-
- Version >= 3.0.0, < 3.0.14StatusaffectedConstraints-
- Version >= 4.0.0, < 4.0.7StatusaffectedConstraints-
- Version >= 5.0.0, < 5.0.4StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FirebirdSQL | Firebird | n/a |
|
OR
- ≥ 3.0.0 · < 3.0.14
- ≥ 4.0.0 · < 4.0.7
- ≥ 5.0.0 · < 5.0.4
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Weaknesses (1)
References (5)
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-23486 Advisory
- https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14 x_refsource_MISCRelease Notes
- https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7 x_refsource_MISCRelease Notes
- https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4 x_refsource_MISCRelease Notes
- https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7jq3-6j3c-5cm2 x_refsource_CONFIRMExploitVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-23486 | Advisory | |
| https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14 | x_refsource_MISCRelease Notes | |
| https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7 | x_refsource_MISCRelease Notes | |
| https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4 | x_refsource_MISCRelease Notes | |
| https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7jq3-6j3c-5cm2 | x_refsource_CONFIRMExploitVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner GitHub_M
Published Apr 17, 2026
Updated Apr 20, 2026
Reserved Mar 26, 2026
Link CVE-2026-34232
CISA Vulnrichment
Updated Apr 20, 2026
ENISA EUVD
EUVD-2026-23486 Assigner GitHub_M
Published Apr 17, 2026
Updated Apr 20, 2026
Exploited since n/a
Link EUVD-2026-23486