RustCrypto RSA Crate up to 0.9.9 improper check or handling of exceptional conditions

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in RustCrypto RSA Crate up to 0.9.9 and classified as problematic. Affected is an unknown function. Performing a manipulation results in improper check or handling of exceptional conditions. This vulnerability is cataloged as CVE-2026-21895. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in RustCrypto RSA Crate up to 0.9.9. This affects an unknown part. The manipulation with an unknown input leads to a improper check or handling of exceptional conditions vulnerability. CWE is classifying the issue as CWE-703. The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product. This is going to have an impact on availability. The summary by CVE is:

The `rsa` crate is an RSA implementation written in rust. Prior to version 0.9.10, when creating a RSA private key from its components, the construction panics instead of returning an error when one of the primes is `1`. Version 0.9.10 fixes the issue.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-21895 since 01/05/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 282486 (Linux Distros Unpatched Vulnerability : CVE-2026-21895), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.9.10 eliminates this vulnerability. Applying the patch 2926c91bef7cb14a7ccd42220a698cf4b1b692f7 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (282486). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper check or handling of exceptional conditions
CWE: CWE-703
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 282486
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-21895

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: RSA Crate 0.9.10
Patch: 2926c91bef7cb14a7ccd42220a698cf4b1b692f7

Timelineinfo

01/05/2026 CVE reserved
01/08/2026 +3 days Advisory disclosed
01/08/2026 +0 days VulDB entry created
03/12/2026 +63 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-9c48-w39g-hm26
Status: Confirmed

CVE: CVE-2026-21895 (🔒)
GCVE (CVE): GCVE-0-2026-21895
GCVE (VulDB): GCVE-100-340119

Entryinfo

Created: 01/08/2026 16:07
Updated: 03/12/2026 20:39
Changes: 01/08/2026 16:07 (70), 01/09/2026 08:51 (2), 01/09/2026 13:09 (1), 03/12/2026 20:39 (18)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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