Panic Vulnerability in loona-hpack
Priority MEDIUM 56CWE-755Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
loona is an experimental, HTTP/1.1 and HTTP/2 implementation in Rust on top of io-uring. `loona-hpack` suffers from the same vulnerability as the original `hpack` as documented in issue #11. All users who try to decode untrusted input using the Decoder are vulnerable to this exploit. This issue has been addressed in release version 0.4.3. All users are advised to upgrade. There are no known workarounds for this vulnerability.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0048 41st percentileScored 2026-11-07
Fix Fixed loona (bearcove): 0.4.3loona-hpack (crates.io): 0.4.3
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| bearcove | loona | before 0.4.3 | 0.4.3 | Patch available | CNA |
| — | loona-hpack (crates.io) | before 0.4.3 | 0.4.3 | Patch available | GHSA-7vm6-qwh5-9x44 |
- loona Vendorbearcove Affected before 0.4.3 Fixed in 0.4.3 Patch available CNA
- loona-hpack (crates.io) Vendor— Affected before 0.4.3 Fixed in 0.4.3 Patch available GHSA-7vm6-qwh5-9x44
Remediation
- Fix · CNA loona (bearcove) Fixed in 0.4.3
- Fix · GHSA-7vm6-qwh5-9x44 loona-hpack (crates.io) Fixed in 0.4.3 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-51502
- 2026-10-03 Alias added: GHSA-7vm6-qwh5-9x44
References
Advisory 2
Sources
- CVE-2024-51502 · CVE Program
- CVE-2024-51502 · NVD
- FIRST EPSS
- GHSA-7vm6-qwh5-9x44 · GitHub Advisory Database · CC BY 4.0
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