{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-8503 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-8503 is a medium-severity vulnerability in GUIMARD Apache::Session::Generate::SHA256, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-8503 and fix it if it is affected.\n\nWhat it is: CVE-2026-8503 is a medium-severity vulnerability in GUIMARD Apache::Session::Generate::SHA256, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-8503 in the wild and no public exploit code.\n\nAffected product: GUIMARD Apache::Session::Generate::SHA256. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-8503/ (Markdown: https://insights.sbomify.com/CVE-2026-8503/index.md)","id":"CVE-2026-8503","markdown":"https://insights.sbomify.com/CVE-2026-8503/index.md","name":"CVE-2026-8503","record":{"aliases":["DEBIAN-CVE-2026-8503","GHSA-2c59-fqg7-rwrx","UBUNTU-CVE-2026-8503"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Perl session library","requires_auth":"none","summary":"Insecure session ID generation using low-entropy sources allows attackers to predict IDs and hijack user sessions.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CPANSec","cpe":[{"product":"apache\\","vendor":"guimard"}],"cvss":{"score":6.5,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-340","name":"Generation of Predictable Numbers or Identifiers"},{"id":"CWE-338","name":"Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)"}],"description":"Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids.\n\nApache::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.\n\nNote 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.\n\nThis issue is similar to CVE-2025-40931 for Apache::Session::Generate::MD5.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids","id":"CVE-2026-8503","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"weak_cryptography","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution","id":"CVE-2026-8505"},"packages":[],"prev":{"headline":"LearnPress \u003c= 4.3.6 - Unauthenticated Sensitive Information Exposure via 'c_status' and 'return_type' Parameters","id":"CVE-2026-8502"},"products":["Apache::Session::Generate::SHA256"],"published":"2026-05-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-15","vendors":["GUIMARD"]},"summary":"Insecure session ID generation using low-entropy sources allows attackers to predict IDs and hijack user sessions.","url":"https://insights.sbomify.com/CVE-2026-8503/"}