RabbitMQ amqp091-go: Silent Data Truncation and State Corruption via Shortstr Integer Overflow
RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, the writeShortstr function in write.go casts the byte length of AMQP shortstr property values to uint8 without first rejecting values longer than 255 bytes. An application that accepts an oversized CorrelationId, ReplyTo, MessageId, Expiration, UserId, AppId, ContentType, ContentEncoding, or Type value can therefore serialize a wrapped length and only a truncated prefix, while reporting no error. The resulting silent metadata corruption can break request and reply correlation, routing, tracing, and downstream message processing. This issue is fixed in version 1.13.0.
- Published
- Sep 16, 2026
- Updated
- Sep 23, 2026
- EPSS
- 0.5% · 42th percentile
- CWE
- CWE-190
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Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 36 / 40 · 9.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · GitHub_M
- 9.1
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:L
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
rabbitmq amqp091-go
- < 1.13.0affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | golang-github-rabbitmq-amqp091-go | all versions | — |
| Debian:14 | golang-github-rabbitmq-amqp091-go | before 1.14.0-1 | 1.14.0-1 |
| Go | github.com/rabbitmq/amqp091-go | before 1.13.0 | 1.13.0 |
Same product
rabbitmq: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-77411RabbitMQ amqp091-go: Protocol Desynchronization and Frame Injection via Integer Overflow in readLongstr38Monitor
- CVE-2026-77405RabbitMQ amqp091-go: Missing Explicit TLS Minimum Version Configuration In URI Parser37Monitor
- CVE-2026-77412RabbitMQ amqp091-go: Denial of Service via Malicious Field Length in AMQP Client35Monitor
- CVE-2026-77410RabbitMQ amqp091-go: Resource Exhaustion (OOM) via Unbounded Body Buffer Allocation35Monitor
- CVE-2026-77403RabbitMQ amqp091-go: Denial of Service via Sub-Spec Frame Size Negotiation35Monitor
- CVE-2026-79921amqp091-go has a Potential Memory Exhaustion/Protocol Violation via Broker-Controlled Oversized Payload35Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| rabbitmq amqp091-go | 1.13.0 · description | Vendor (CNA) |
| azl3 keda 2.14.1-18 on Azure Linux 3.0 | — | Microsoft (MSRC) |
| azl3 keda 2.14.1-19 on Azure Linux 3.0 | Release Notes | Microsoft (MSRC) |
| azl3 telegraf 1.31.0-31 on Azure Linux 3.0 | — | Microsoft (MSRC) |
| azl3 telegraf 1.31.0-33 on Azure Linux 3.0 | Release Notes | Microsoft (MSRC) |
| debian:golang-github-rabbitmq-amqp091-go | 1.14.0-1 · Debian:14 | Package registry (OSV) |
| Go:github.com/rabbitmq/amqp091-go | 1.13.0 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- X
Weakness class (CWE)
CWE-190 · Integer Overflow or WraparoundCVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/rabbitmq/amqp091-go/commit/6959423aa2784a1971e399175dfb2065dea0f3b0
- github.com/rabbitmq/amqp091-go/pull/354
- github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0
- github.com/rabbitmq/amqp091-go/security/advisories/GHSA-j497-x9hr-x34x
Vendor advisories and official records. Exploit/PoC links are deliberately left out.