Medium
libapache-session-browseable-perl — security advisory
Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids. Apache::Session::Generate::SHA256 generated session ids insecurely. The default session id generator returns a SHA-256 hash of the built-in rand() function, the epoch time, and the PID, that is hashed again. These are predictable, low-entropy sources. Predicable session ids could allow an attacker to gain access to systems. Note that version 1.3.19 has a fallback without warning to use insecure session generation method if the call to Crypt::URandom::urandom fails. However, this is unlikely as Crypt::URandom is a hardcoded requirement of the module. This issue is similar to CVE-2025-40931 for Apache::Session::Generate::MD5.
- Products
- libapache-session-browseable-perl
- Affected versions
- 1.0.2-2, 1.1-1, 1.2.2-1, 1.2.8-1, 1.3.11-3, 1.3.13-1, 1.3.14-1, 1.3.16-1, 1.3.18-1, 1.3.19-1, 1.3.2-1, 1.3.3-1, 1.3.4-1, 1.3.5-1, 1.3.9-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-8503
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:23 UTC · Revision 1
Source evidence
Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids. Apache::Session::Generate::SHA256 generated session ids insecurely. The default session id generator returns a SHA-256 hash of the built-in rand() function, the epoch time, and the PID, that is hashed again. These are predictable, low-entropy sources. Predicable session ids could allow an attacker to gain access to systems. Note that version 1.3.19 has a fallback without warning to use insecure session generation method if the call to Crypt::URandom::urandom fails. However, this is unlikely as Crypt::URandom is a hardcoded requirement of the module. This issue is similar to CVE-2025-40931 for Apache::Session::Generate::MD5.
osv:UBUNTU-CVE-2026-8503
libapache-session-browseable-perl
Fixed versions: Not specified
libapache-session-browseable-perl
Fixed versions: Not specified
libapache-session-browseable-perl
Fixed versions: Not specified
libapache-session-browseable-perl
Fixed versions: Not specified
libapache-session-browseable-perl
Fixed versions: Not specified
libapache-session-browseable-perl
Fixed versions: Not specified
libapache-session-browseable-perl
Fixed versions: Not specified
libapache-session-browseable-perl
Fixed versions: Not specified
Complete source record
{
"id": "b2026c654d827fc7a9fab4ef0305e74c38ce865cfa143dc8d485a3c7abb29687",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-8503",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-8503",
"summary": "Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids. Apache::Session::Generate::SHA256 generated session ids insecurely. The default session id generator returns a SHA-256 hash of the built-in rand() function, the epoch time, and the PID, that is hashed again. These are predictable, low-entropy sources. Predicable session ids could allow an attacker to gain access to systems. Note that version 1.3.19 has a fallback without warning to use insecure session generation method if the call to Crypt::URandom::urandom fails. However, this is unlikely as Crypt::URandom is a hardcoded requirement of the module. This issue is similar to CVE-2025-40931 for Apache::Session::Generate::MD5.",
"evidence": "osv:UBUNTU-CVE-2026-8503",
"products": [
{
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},
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{
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{
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{
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},
{
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"evidence": "/affected/7/versions"
},
{
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"evidence": "/affected/7/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-8503",
"aliases": [
"UBUNTU-CVE-2026-8503"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
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"versions": [
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"database_specific": {
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},
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{
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"purl": "pkg:deb/ubuntu/libapache-session-browseable-perl?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.2.2-1",
"1.2.8-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8503.json"
},
"ecosystem_specific": {
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}
]
}
},
{
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"purl": "pkg:deb/ubuntu/libapache-session-browseable-perl?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.3.2-1",
"1.3.3-1",
"1.3.4-1",
"1.3.5-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8503.json"
},
"ecosystem_specific": {
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"purl": "pkg:deb/ubuntu/libapache-session-browseable-perl?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.3.9-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8503.json"
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"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1.3.14-1",
"1.3.16-1"
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],
"modified": "2026-10-17T13:01:13.119484992Z",
"provider": "osv",
"upstream": [
"CVE-2026-8503"
],
"references": [
"https://ubuntu.com/security/CVE-2026-8503",
"https://www.cve.org/CVERecord?id=CVE-2026-8503",
"https://lists.security.metacpan.org/cve-announce/msg/40079348/",
"https://github.com/LemonLDAPNG/Apache-Session-Browseable/commit/cc915cbbd266776eec3dd8bf4748b15fa827dbd0",
"https://github.com/LemonLDAPNG/Apache-Session-Browseable/commit/cc915cbbd266776eec3dd8bf4748b15fa827dbd0.patch",
"https://metacpan.org/release/GUIMARD/Apache-Session-Browseable-1.3.19/changes",
"https://metacpan.org/release/GUIMARD/Apache-Session-Browseable-1.3.19/diff/GUIMARD/Apache-Session-Browseable-1.3.18#lib/Apache/Session/Generate/SHA256.pm",
"https://www.cve.org/CVERecord?id=CVE-2025-40931",
"https://www.cve.org/CVERecord?id=CVE-2025-40932"
]
},
"related_cves": [
{
"value": "CVE-2026-8503",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361277,
"published_at": "2026-05-15T12:17:00+00:00"
}