Medium severity · published Aug 24, 2026
CVE-2026-77310
jackson-databind: Eager DNS resolution (SSRF) still present in InetAddress deserialization (Incomplete fix for CVE-2026-54514)
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. Prior to versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1 on their respective release lines, the java.net.InetAddress branch of FromStringDeserializer.Std._deserialize() calls InetAddress.getByName() on attacker-controlled input, causing eager DNS resolution during deserialization and enabling DNS-based server-side request forgery and internal-host enumeration. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
com.fasterxml.jackson.core:jackson-databind · FasterXML
>= 2.0.0, < 2.18.9; >= 2.19.0, < 2.21.5; >= 2.22.0, < 2.22.1 · source: vendor
TO
tools.jackson.core:jackson-databind · FasterXML
>= 3.0.0, < 3.1.5; >= 3.2.0, < 3.2.1 · source: vendor
Affected product
CO
com.fasterxml.jackson.core:jackson-databind
FasterXML