# 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.

- **Severity:** High 8.2 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Oct 2026
- **Updated:** 9 Oct 2026
- **Also known as:** AZL-106919, AZL-107988, CLEANSTART-2026-RP19895, CLEANSTART-2026-UK97586, DEBIAN-CVE-2026-102554, ECHO-329e-e74c-b8eb, GHSA-xxph-c9ww-hj94, MINI-3h8j-8fxg-g9pj, MINI-cmmr-r5xv-mrfj, MINI-fc86-9jr4-wcpx, MINI-fx45-pj58-m97g, MINI-gqc6-4mgp-qvr3, MINI-j33j-4p8x-8q2h, MINI-jgww-g7c3-mh34, MINI-wppg-8q6p-pqf9, SUSE-SU-2026:24263-1, UBUNTU-CVE-2026-102554, openSUSE-SU-2026:12109-1, openSUSE-SU-2026:22143-1

## 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.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling), CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2026-102554?

2 open source packages ship an affected version, including com.google.guava:guava.


| Package | Ecosystem | 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 |
| `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.

## Is CVE-2026-102554 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-102554 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-102554 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-102554 exists.

Affected packages and fixed versions:
- com.google.guava:guava (Maven): affected from 4.0; fixed in 33.7.2
- com.google.guava:guava (Maven): affected from 4.0; fixed in 33.7.2

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-102554/ (Markdown: https://insights.sbomify.com/CVE-2026-102554/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-102554
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-102554
- OSV: https://osv.dev/vulnerability/CVE-2026-102554

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-102554/
Summaries are generated and may contain mistakes; the official description above is the record.