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01 Record

CVE-2026-44167

phpseclib: CVE-2024-27355 mitigation bypass — OID amplification DoS in ASN1::decodeOID()

HighPUBLISHEDCNA: GitHub_M
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

02 Description

phpseclib: CVE-2024-27355 mitigation bypass — OID amplification DoS in ASN1::decodeOID()

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.20% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 9.8% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Deferred. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-05-12 17:22Z5 MO AGO
Last updated
2026-05-14 19:24Z5 MO AGO
Reserved
2026-05-05
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-400Uncontrolled Resource ConsumptionClass
Data version
5.2
Document digest
878247be616bd5e9ec46d8e54c6cb6860bbc7daeb6a1db90105b50e407091615

05 Affected products

VendorProductVersionsPlatforms
phpseclibphpseclib>= 3.0.0, < 3.0.52, >= 2.0.0, < 2.0.54, >= 0.1.1, < 1.0.29—

06 References

07 Fixed in

Debian 12

  • php-phpseclib
    Fixed in 2.0.42-1+deb12u5
  • php-phpseclib3
    Fixed in 3.0.19-1+deb12u6
  • phpseclib
    Fixed in 1.0.20-1+deb12u5

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • php-phpseclib
    Fixed in 2.0.48-3+deb13u3
  • php-phpseclib3
    Fixed in 3.0.43-2+deb13u3
  • phpseclib
    Fixed in 1.0.23-6+deb13u3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • php-phpseclib
    Fixed in 2.0.54-1
  • php-phpseclib3
    Fixed in 3.0.52-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • phpseclib
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • php-phpseclib3
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 25.10

  • php-phpseclib
    No fix yet
  • php-phpseclib3
    No fix yet
  • phpseclib
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • php-phpseclib3
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.10

  • php-phpseclib3
    No fix yet
  • phpseclib
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • php-phpseclib
    Fixed in 2.0.1-1ubuntu0.1~esm1
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
  • phpseclib
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • php-phpseclib
    Fixed in 2.0.9-1ubuntu0.1~esm3
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • phpseclib
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • php-phpseclib
    Fixed in 2.0.23-2ubuntu0.1~esm3
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • phpseclib
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 22.04 LTS

  • php-phpseclib
    Fixed in 2.0.36-1ubuntu0.1~esm3
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • php-phpseclib3
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 24.04 LTS

  • php-phpseclib
    Fixed in 2.0.47-1ubuntu0.1~esm1
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • phpseclib
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 26.04 LTS

  • php-phpseclib
    Fixed in 2.0.51-1ubuntu0.1~esm1
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • phpseclib
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.