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CVE-2026-32935

21
FAUCET Score

CVE-2026-32935 is a padding oracle timing attack vulnerability affecting phpseclib versions 1.0.26 and below, 2.0.0 through 2.0.51, and 3.0.0 through 3.0.49 when using AES in CBC mode. Rated 5.9 MEDIUM, this vulnerability allows a remote attacker to potentially compromise data confidentiality due to information exposure through timing discrepancies (CWE-208), though exploitation complexity is high. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.27CPE matchmatch criteria
cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*
>= 2.0.0, < 2.0.52CPE matchmatch criteria
cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*
>= 3.0.0, < 3.0.50CPE matchmatch criteria
cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

8.2HIGH

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
30.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 4th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

composerpatch availablevia ghsa
Product: phpseclib/phpseclibFixed in: 3.0.50
composerpatch availablevia ghsa
Product: phpseclib/phpseclibFixed in: 2.0.52
composerpatch availablevia ghsa
Product: phpseclib/phpseclibFixed in: 1.0.27
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-94g3-g5v7-q4jghigh

phpseclib's AES-CBC unpadding susceptible to padding oracle timing attack

Mar 19, 2026

References

github.com / phpseclib/phpseclib/commit/ccc21aef71eb170e9bf819b167e67d1fd9e6e788
Patch
github.com / phpseclib/phpseclib/security/advisories/GHSA-94g3-g5v7-q4jg
PatchVendor Advisory