CVE-2026-102554 Denial of Service via Eager Array Allocation During Deserialization in Guava
Attackers can cause denial of service via memory exhaustion by crafting malicious serialization streams for specific Guava map classes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-102554?
CVE-2026-102554 is a high-severity denial of service vulnerability in Google Guava, published on 9 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Allocation of resources without limits or throttling (CWE-770) during Java object deserialization in Google Guava versions 4.0 through 33.7.1 allows an attacker to cause a Denial of Service via OutOfMemoryError. When deserializing CompactHashMap, CompactHashSet, or MapMakerInternalMap instances, Guava eagerly allocates an array based on a caller-specified size parameter without throttling, permitting memory exhaustion from crafted serialization streams.
Which versions are affected by CVE-2026-102554?
2 open source packages ship an affected version, including com.google.guava:guava.
| Package | Affected | Fixed in |
|---|---|---|
com.google.guava:guava Maven | From 4.0 | 33.7.2 |
com.google.guava:guava Maven | From 4.0 | 33.7.2 |
Linux distribution packages (4)
guava SUSE:Linux Enterprise Server 16.0 | All versions | 33.7.2-160000.1.1 |
guava SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 33.7.2-160000.1.1 |
guava openSUSE:Leap 16.0 | All versions | 33.7.2-160000.1.1 |
guava openSUSE:Tumbleweed | All versions | 33.7.2-1.1 |
How do I fix CVE-2026-102554?
Upgrade com.google.guava:guava to 33.7.2 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-102554 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-102554 exists.
Sources
Also known as AZL-106919, AZL-107988, CLEANSTART-2026-RP19895, CLEANSTART-2026-UK97586, DEBIAN-CVE-2026-102554, ECHO-329e-e74c-b8eb and 13 more.