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CVE.org (no NVD analysis yet)· CNA GitHub_M

CVE-2026-115906: zip: AES Entry HMAC Authentication Bypass on Premature EOF

MediumCVSS 6.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.15% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: zip-rs zip2 9.0.0; azl3 rust 1.75.0-31 on Azure Linux 3.0 Release Notes; azl3 rust 1.98.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to zip-rs zip2 9.0.0; azl3 rust 1.75.0-31 on Azure Linux 3.0 Release Notes; azl3 rust 1.98.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

zip is a zip library for Rust that supports reading and writing simple ZIP files. From 0.6.0 until 9.0.0, the AES entry reader in src/aes.rs verifies its HMAC only when the attacker-controlled data counter reaches zero. If the underlying bounded reader reaches the real end of the archive while data_remaining is still positive, or if an encrypted entry has no payload, the reader can return a clean end of stream without reading and comparing the authentication tag. Applications using by_index_decrypt, by_name_decrypt, by_path_decrypt, or password-enabled by_index_with_options can therefore accept modified plaintext without an authentication error. This issue is fixed in version 9.0.0.

Published
Oct 26, 2026
Updated
Oct 31, 2026
EPSS
0.1% · 4th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
6.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

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.

  • zip-rs zip2

    • >= 0.6.0, < 9.0.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
crates.iozipfrom 0.6.0 · before 9.0.09.0.0
Debian:12rust-zipfrom 0—
openSUSE:Leap 16.0rust-keylimebefore 0.2.10+12-160000.1.10.2.10+12-160000.1.1
SUSE:Linux Enterprise Micro 5.4rust-keylimebefore 0.2.10+12-150400.3.22.10.2.10+12-150400.3.22.1
SUSE:Linux Enterprise Micro 5.5rust-keylimebefore 0.2.10+12-150500.3.22.10.2.10+12-150500.3.22.1
SUSE:Linux Micro 6.2rust-keylimebefore 0.2.10+12-160000.1.10.2.10+12-160000.1.1

Same product

zip-rs: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-115905zip: Critical Parser Differential & Security Control Bypass via Dual-Header Inconsistencies (Zip Cloaking) Leading to Arbitrary File Overwrite & RCE
    40Plan
  • CVE-2026-115909zip: Unbounded Symlink-Target Handling Can Abort Or Exhaust Memory During Extraction
    30Monitor
  • CVE-2026-115907zip: legacy Shrink/Reduce/Implode decoder: denial of service from attacker-controlled ZIP64 uncompressed size
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-29787Mar 17, 2025 · zip Vulnerable to Incorrect Path Canonicalization During Archive Extraction, Leading to Arbitrary File Write
    29Monitor
  • Later →CVE-2026-115908Oct 26, 2026 · zip: Arbitrary file write outside the extraction directory, because ZipArchive::extract validates symlink targets lexically. (The defense against…
    29Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
zip-rs zip29.0.0 · descriptionVendor (CNA)
azl3 rust 1.75.0-31 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 rust 1.98.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
crates.io:zip9.0.0Package registry (OSV)
opensuse:rust-keylime0.2.10+12-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:rust-keylime0.2.10+12-150400.3.22.1 · SUSE:Linux Enterprise Micro 5.4Package registry (OSV)
suse:rust-keylime0.2.10+12-160000.1.1 · SUSE:Linux Micro 6.2Package 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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 13, 2026+18 d
EPSS, last 120 days

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.

Not on record for this CVE: researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-354 · Improper Validation of Integrity Check Value

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

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.

ATT&CK techniques

—

Change log

  1. SSVC exploitation— → poc
  2. Exploit maturity— → none
  3. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records