CVE-2026-45799
What it is
Wire provides gRPC and protocol buffers for Android, Kotlin, Swift, and Java. Prior to 6.3.0 and 7.0.0-alpha03, ByteArrayProtoReader32.skipGroup() and ProtoReader.skipGroup() in wire-runtime do not validate that a LENGTH_DELIMITED field length is non-negative before skip(), allowing a crafted protobuf varint encoding -128 as a signed Int to make skip(-128) move the internal position negative and make the next readByte() throw ArrayIndexOutOfBoundsException instead of the documented IOException or ProtocolException, which can crash services using ProtoAdapter.decode(byte[]) on untrusted payloads. This issue is fixed in versions 6.3.0 and 7.0.0-alpha03.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 0.7% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.7% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.7% · EPSS, next 30 days
- Weakness
- CWE-129
- Record status
- Analyzed
Affected
- Squareup Wire < 6.3.0
- Squareup Wire 7.0.0
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-45799.md and follow it. Check whether this project is affected by CVE-2026-45799. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0
- https://github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773
- https://github.com/square/wire/pull/3595
- https://github.com/square/wire/pull/3597
- https://github.com/square/wire/releases/tag/6.3.0
- https://github.com/square/wire/releases/tag/7.0.0-alpha03
- https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9
- https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9
References
- https://github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0
- https://github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773
- https://github.com/square/wire/pull/3595
- https://github.com/square/wire/pull/3597
- https://github.com/square/wire/releases/tag/6.3.0
- https://github.com/square/wire/releases/tag/7.0.0-alpha03
- https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9
- https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9