CVE-2026-59884: pyasn1 vulnerabilities
Affects pyasn1Source GCVE Database
Mentioned vulnerabilities
Not known to be exploited · fixed in 0.1.7-1ubuntu2.1+esm2 : patch pyasn1 soon.
Data as of 10 Nov 2026, 03:50 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- Patch
- Available – fixed in 0.1.7-1ubuntu2.1+esm2, 0.1.9-1ubuntu0.1~esm2, 0.4.2-3ubuntu0.18.04.1~esm2 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 9 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10pyasn1pkg:deb/ubuntu/pyasn1?arch=source&distro=stonkingOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSpyasn1pkg:deb/ubuntu/pyasn1?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSpyasn1pkg:deb/ubuntu/pyasn1?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 22.04 LTSpyasn1pkg:deb/ubuntu/pyasn1?arch=source&distro=jammyOther threats | Affected
| Fixed in
|
Ubuntu Pro 20.04 LTSpyasn1pkg:deb/ubuntu/pyasn1?arch=source&distro=esm-infra/focalOther threats | Affected
| Fixed in
|
Ubuntu Pro 18.04 LTSpyasn1pkg:deb/ubuntu/pyasn1?arch=source&distro=esm-infra/bionicOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Fixes for these vulnerabilities are available in updated pyasn1 package versions for affected Ubuntu releases. Users should apply the security updates referenced in Ubuntu Security Notice USN-9011-1 and upgrade to the fixed versions: 0.1.7-1ubuntu2.1+esm2, 0.1.9-1ubuntu0.1~esm2, 0.4.2-3ubuntu0.18.04.1~esm2, 0.4.2-3ubuntu0.20.04.1~esm2, 0.4.8-1ubuntu0.4, 0.4.8-4ubuntu0.4, 0.6.4-1ubuntu0.1, or 0.6.3-1ubuntu0.2. Applying these patches mitigates the risk of denial of service.
Description
Multiple vulnerabilities in the pyasn1 library affect various Ubuntu LTS releases, allowing denial of service via excessive CPU or memory consumption when decoding untrusted ASN.1 data. These issues include improper bounding of long-form tag identifiers, quadratic time processing of OBJECT IDENTIFIER and RELATIVE-OID values, incorrect REAL value conversions, and inefficient handling of fragmented constructed strings and BIT STRING values. The vulnerabilities impact Ubuntu 14.04 LTS through 26.10, with fixes available in updated package versions.
References
- ubuntu.com/security/notices/USN-9011-1 (opens in a new tab)
- ubuntu.com/security/CVE-2026-59884 (opens in a new tab)
- ubuntu.com/security/CVE-2026-59885 (opens in a new tab)
- ubuntu.com/security/CVE-2026-59886 (opens in a new tab)
- ubuntu.com/security/CVE-2026-119194 (opens in a new tab)
- ubuntu.com/security/CVE-2026-119195 (opens in a new tab)
- ubuntu.com/security/CVE-2026-119196 (opens in a new tab)
- ubuntu.com/security/CVE-2026-119197 (opens in a new tab)