# CVE-2026-8503: libapache-session-browseable-perl: Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids

CVE-2026-8503 is fixed in 2 products on 1 platform, first by FEDORA-2026-E8EF64B8D3, released May 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-8503
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 14, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libapache-session-browseable-perl Debian 12.15 (bookworm) | 1.3.11-3+deb12u1 | [DEBIAN-CVE-2026-8503](https://patchblox.com/security/data/fix/linux/debian-cve-2026-8503.md) | May 27, 2026 |
| Linux | libapache-session-browseable-perl Debian 13.5 (trixie) | 1.3.16-1+deb13u1 | [DEBIAN-CVE-2026-8503](https://patchblox.com/security/data/fix/linux/debian-cve-2026-8503.md) | May 27, 2026 |
| Linux | libapache-session-browseable-perl Debian 14 | 1.3.19-1 | [DEBIAN-CVE-2026-8503](https://patchblox.com/security/data/fix/linux/debian-cve-2026-8503.md) | May 27, 2026 |
| Linux | perl-Apache-Session-Browseable Fedora 43 | 1.3.19-1.fc43 | [FEDORA-2026-E8EF64B8D3](https://patchblox.com/security/data/fix/linux/fedora-2026-e8ef64b8d3.md) | May 14, 2026 |

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Data as of 2026-11-10T01:44:33Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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